Vol. 45 Contents 1991

ANHOLT, BRADLEY R. Measuring selection on a population of damselflies with a manipulated phenotype...1091

ARGYRES, ANNETA Z., AND JOHANNA SCHMITT. Microgeographic genetic structure of morphological and life history traits in a natural population of Impatiens capensis ...178

ARMBRUSTER, W. SCOTT. Multilevel analysis of morphometric data form natural plant populations: Insights into ontogenetic, genetic, and selective correlations in Dalechampia scandens ...1229

ARNTZEN, J. W., AND G. P. WALLIS. Restricted gene flow in a moving hybrid Zone of the newts Triturus cristatus and T. marmoratus in western France ....805

ATCHLEY, WILLIAM R., TINA LOGSDON, DAVID E. COWLEY, AND E. J. EISEN. Uterine effects, epigenetics, and postnatal skeletal development in the mouse ...891

AVISE, JOHN C., JOEL C. TREXLER, JOSEPH TRAVIS, AND WILLIAM S. NELSON. Poecilia mexicana is the recent fema e parent of the unisexual fish P. formosa ...1530

BARTON, N. H., AND S. ROUHAN The probability of fixation of a new karyotype in a continuous population ...499

BELL, GRAHAM. The ecology an genetics of fitness in Chalmydomonas 111. Genotype by environment intction within strains ...668

BELL, GRAHAM. The ecology an genetics of fitness in Chlamydomonas. IV. The properties of mixtures of ge types of the same species...1036

BENDIX, J. H., JR., AND DANIEL HOWARD. Calling song displacement in a zone of overlap and hybridizatio...1751

BERGLUND, ANDERS. Egg compet ion in a sexrole reversed pipefish: Subdominant females trade reproduction r growth .770

BERNATCHEZ, Louis, AND JULIAP ~J. DODSON. Phylogeographic structure in mitochondrial DNA of the lake Vitefish (Coregonus clupeaformis) and its Relation to Pleistocene glaciations ...1016

Bi6RKLUND, MATS. Evolution, phylogeny, sexual dimorphism and mating system in the grackles (Quiscalus spp    Icterinae) . 608

BLANCKENHORN, WOLF U. Lifehistory differences in adjacent water strider populations: Phenotypic plasticity or heritable responses to stream temperature?... 1520

BLOWS, M. W., AND M. P. SCHWARZ. Spatial distribution of a primitively Social bee: Does genetic population structure facilitate altruism? ...680

BOILEAU, MARC G., AND PAUL D. N. HEBERT. Genetic consequences of passive ,dispersal in ponddwelling copepods ...721

BOUCOT, A. J., AND JANE GRAY. Extinctions. (Book review)...1294

BRODIE, EDMUND D., III, AND EDMUND D. BRODIE, JR. Evolutionary response of predators to dangerous prey: Reduction of toxicity of newts and resistance of garter snakes in island populations . 221

BROWER, A. V. Z., AND T. M. BOYCE. Mitochondrial DNA variation in monarch butterflies . ..1281

BROWN, BONNIE L., AND ROBERT W. CHAPMAN. Gene flow and mitochondrial DNA variation in the killifish, Fundulus heteroclitus . ..1147

BROWN, VALERIE K. Qualitative natural history is not enough. (Book review) ...1062

BULL, J. J., IAN J. MOLINEUX, AND W. R. RICE. Selection of benevolence in a Host parasite system ...875

BURDON, J. J., AND A. M. JAROSZ. Hostpathogen interactions in natural populations of Linum marginale and Melampsora lini: 1. Patterns of resistance and racial variation in a large host population ...205

BUSH, ROBIN M., AND PETER E. SMOUSE. The impact of electrophoretic genotype on life history traits in Pinus taeda ... 481

CABANA, GILBERT, AND DONALD L. KRAMER. Random offspring mortality and variation in parental fitness . ...228

CAMPBELL, DIANE R. Comparing pollen dispersal and gene flow in a natural population ...1965

CAMPBELL, DIANE R., NICKOLAS M. WASER, MARY V. PRICE, ELIZABETH A. LYNCH, AND RANDALL J. MITCHELL. Components of phenotypic selection: Pollen export and flower corolla width in Ipomopsis aggregata ....1458

CARLSON, SANDRA J. Development as an evolutionary force. (Book review) …1534

CLUTTONBROCK, T. H. Lifetime data and the measurement of selection ..454

COHAN, FREDERICK M., MICHAEL S. ROBERTS, AND ELAINE C. KING. The potential for genetic exchange by transformation within a natural population of Baciffils subtilis...1393

COYNE, JERRY A., BRIAN CHARLESWORTH, AND H. ALLEN ORR. Haldane's rule revisited ...1710

CRESPI, BERNARD J. Heterozygosity in the haplodiploid Thysanoptera ...458

CUNNINGHAM, C. W., L. W. Buss, AND CORT ANDERSON. Molecular and geologic evidence of shared history between hermit crabs and the symbiotic genus Hydractinia ...1301

DELPH, LYNDA F., AND DAVID G. LLOYD. Environmental and genetic control of gender in the dimorphic shrub Hebe subalpina ...1957

DENNISON, MICHAEL D., AND ALLAN J. BAKER. Morphometric variability in continental and Atlantic island populations of chaffinches (Fringilla coelebs) ...29

DORN, LISA A., AND THOMAS MITCHELLOLDS. Genetics of Brassica campestris 1. Genetic constraints on evolution of lifehistory characters . ... 371

DOWLING, THOMAS E., AND WALTER R. HOEH. The extent of introgression outside the contact zone between Notropis cornutus and Notropis chrysocephalus (Teleostei: Cyprinidae) ...944

DOWNIE, STEPHEN R., RICHARD G. OLMSTEAD, GERARD ZuRAwsKi, DOUGLAS E. SOLTIS, PAMELA S. SOLTIS, JOHN C. WATSON, AND JEFFREY D. PALMER. Six independent losses of the chloroplast DNA rp12 intron in dicotyledons: Molecular and phylogenetic implications . ...1245

EBBERT, MERCEDES A. The interaction phenotype in the Drosophila willistoni spiroplasma symbiosis . 971

EBERHARD, WILLIAM G., AND EDGAR E. GUTItRREZ. Male dimorphisms in beetles and earwigs and the question of developmental constraints . 18

ELGAR, MARK A. Sexual cannibalism, size dimorphism, and courtship behavior In orbweaving spiders (Araneidae) . 444

ELLISON, AARON M., AND DEBRA VAM VIKITES. Evolutionarily stable morphologies in pea populations ... 40

ENNos, R. A., AND K. W. SWALES. Genetic variation in a fungal pathogen: Response to host defensive chemicals . 190

FEDYK, STANISLAW, WLODZIMIERZ CHVTNICK1, AND AGATA BANASZEK. Genetic differentiation of Polish populations of Sorex araneus L. 111. Interchromosomal recombination in a hybrid zone . 1384

FENSTER, CHARLES B. Gene flow in Chamaecrista fasciculata (Leguminosae) I. Gene dispersal ...398

FENSTER, CHARLES B. Gene flow in Chamaescrista fasciculata (Leguminosae) H.Gene establishment ...410

FORBES, S. H., AND F. W. ALLENDORF. Associations between mitochondrial. And nuclear genotypes in cutthroat trout hybrid swarms ...1332

FORBES, S. H., AND F. W. ALLENDORF. Mitochondrial genotypes have no detectable effects on meristic traits in cutthroat trout hybrid swarms ...1350

FRANK, STEVEN A. Divergence of meiotic drivesuppression systems as an explanation for sexbiased hybrid sterility and inviability ...262

FRANK, STEVEN A. Haldane's rule: A defense of the meiotic drive theory ...1714

FREED, LEONARD A. A selection in a Galdpagos finch: Value of long-term study ...1296

GALEN, CANDACE, JOEL S. SHORE, AND HUDSON DEYOE. Ecotypic divergence in alpine Polemonium viscosum: Genetic structure, quantitative variation, and local adaptation. ...1218

GARLAND, THEODORE, JR., RAYMOND B. HUEY, AND ALBERT F. BENNETT. Phylogeny and coadaptation of thermal physiology in lizards: A reanalysis ...1969

GEER, BILLY W., STEPHEN W. McKECHNIE, PIETER W. H. HEINSTRA, AND MANFRED J. PYKA. Heritable variation in ethanol tolerance and its association with biochemical traits in Drosophila melanogaster ...1107

GROMKO, MARK H., Amy BRIOT, SUSAN C. JENSEN, AND H. HANK FUKUI. Selection on copulation duration in Drosophila melanogaster: Predictability of direct response versus unpredictability of correlated response ...69

GROSBERG, RICHARD K. Spermmediated gene flow and the genetic structure of a population of the colonial ascidian Botryllus schlosseri ...130

GUILFORD, Tim, AND INNES CUTHILL. The evolution of aposematism in marine Gastropods...449

GUYER, CRAIG, AND JOSEPH B. SLOWINSKI. Comparisons of observed phylogenetic topologies with null expectations among three monophyletic lineages . ...340

HACHTEL, WOLFGANG, ANTJE NEUSS, AND JOERG VOM STEIN. A chloroplast DNA inversion marks an evolutionary split in the genus Oenothera . ..1050

HAN, ERNING, AND A. GAVIN GATEHOUSE. Genetics of precalling period in the Oriental armyworm, Mythimna separata (Walker) (Lepidoptera: Noctuidae), and implications for migration...1502

HARCOURT, A. H. Sperm competition and the evolution of nonfertilizing sperm In mammals ...314

HARSHMAN, L. G., J. A. OTTEA, AND B. D. HAMMOCK. Evolved environment dependent expression of detoxication enzyme activity in Drosophila melanogaster...791

HEINZ, KEVIN M. Sexspecific reproductive consequences of body size in the Solitary ectoparasitoid, Diglyphus begini ...1511

HILLESHEIM, ELKE, AND STEPHEN C. STEARNS. The responses of Drosophila melanogaster to artificial selection on body weight and its phenotypic plasticity in two larval food environments ...1909

HOFFMANN, ARY A., AND STEPHEN W. McKECHNIE. Heritable variation in resource utilization and response in a winery population of Drosophila melanogaster ...1000

HOULE, DAVID. Genetic covariance of fitness correlates: What genetic  Correlations are made of and why it matters ...630

HOWARD, DANIEL J., AND GWENDOLYN L. WARING. Topographic diversity, zone width, and the strength of reproductive isolation in a zone of overlap and hybridization ...1120

HUEY, RAYMOND B., LINDA PARTRIDGE, AND KEVIN FOWLER. Thermal sensitivity of Drosophila melanogaster responds rapidly to laboratory natural selection... 751

HUTCHINGS, JEFFREY A. Fitness consequences of variation in egg size and food abundance in brook trout Salvelinus fontinalis ... 1162

IWASA, YOH, ANDREW POMIANKOWSKI, AND SEAN NEE. The evolution of costly mate preferences 11. The "handicap" principle ...1431

JANZEN, FREDRIC J., AND GARY L. PAUKSTIS. A preliminary test of the adaptive significance of environmental sex determination in reptiles ...435

JARNE, PHILIPPE, Luc FINOT, BERNARD DELAY, AND Louis THALER. Self-fertilization versus cross-fertilization in the hermaphroditic freshwater snail Bulinus globosus ...1136

JAROsz, A. M., AND J. J. BURDON. Hostpathogen interactions in natural  populations of Linum marginale and Melampsora lini: 11. Local and regional variation in patterns of resistance and racial structure ...1618

JOHNSTON, MARK 0. Natural selection on floral traits in two species of  Lobelia with different pollinators ...1468

JORDAN, NICHOLAS. Multivariate analysis of selection in experimental populations derived from hybridization of two ecotypes of the annual plant Diodia teres W. (Rubiaceae) ...1760

KAMBHAMPATI, SRINIVAS, AND KARAMJIT S. RAI. Variation in mitochondrial DNA of Aedes species (Diptera: Culicidae) ...120

KIESER, JULIUS A., AND H. T. GROENEVELD. Fluctuating odontometric asymmetry, morphological variability, and genetic monomorphism in the cheetah Acinonyx jubatus ...1175

KING, B. H., AND S. W. SKINNER. Sex ratio in a new species of Nasonia with fully winged males...225

KING, DAVID G. The origin of an organ: Phylogenetic analysis of evolutionary innovation in the digestive tract of flies (Insecta: Diptera) ...568

KINGSOLVER, JOEL G., AND DIANE C. WIERNASZ. Development, function, and the quantitative genetics of wing melanin pattern in Pieris butterflies ....1480

KOEPFER, H. ROBERTA, AND EUGENE J. FENSTER. Asymmetrical mating patterns between geographic strains of Drosophila mercatorum: A test of the Kaneshiro hypothesis ...455

KOHLMANN, BERT, AND DAVID SHAw. The effect of a partial barrier on the movement of a hybrid zone...1606

KOUFOPANOU, VASSILIKI, AND GRAHAM BELL. Developmental mutants of Volvox: Does mutation recreate the patterns of phylogenetic diversity? ...1806

LEHMAN, NILES, ANDREW EISENHAWER, KIMBERLY HANSEN, L. DAVID MECH, ROLF 0. PETERSON, PETER J. P. GOGAN, AND ROBERT K. WAYNE. Introgression of coyote mitochondrial DNA into sympatric North American gray wolf populations ...104

LEIMAR, OLOF, STEVEN AUSTAD, AND MAGNUS ENQUIST. A test of the sequential assessment game: Fighting in the bowl and doily spider Frontinella pyramitela. ...862

LES, DONALD H., JAMES A. REINARTZ, AND ELIZABETH J. EsSELMAN. Genetic consequences of rarity in Aster furcatus (Asteraceae), a threatened, self-incompatible plant ...1641

LEVIN, DONALD A. The effect of inbreeding on seed survivorship in Phlox ...1047

LEVIN, LISA A., JUN ZHU, AND ELIZABETH CREED. The genetic basis of lifehistory characters in a polychaete exhibiting planktotrophy and lecithotroh ...380

LIVELY, CURTIS M. Sex and death. (Book review) ...468

LYNCH, MICHAEL. The genetic interpretation of inbreeding depression and outbreeding depression ...622

LYNCH, MICHAEL. Methods for the analysis of comparative data in evolutionary biology ...1065

MADDISON, WAYNE P., AND MONTGOMERY SLATKIN. Null models for the number of evolutionary steps in a character on a phylogenetic tree ...1184

MANASSE, ROBIN S., AND KATHERINE PINNEY. Limits to reproductive success in a partially selfincompatible herb: Fecundity depression at serial lifecycle stages...712

MANASSE, ROBIN S., AND MAUREEN L. STANTON. The influence of the mating system on seed size variation in Crinum erubescens (Amaryllidaceae) ...883

MARKOW, THERESE A. Sexual isolation among poulations of Drosophf.7.2 Mojaiensis ...1525

MARTINS, EmiLIA P., AND THEODORE GARLAND, JR. Phylogenetic analvses of the correlated evolution of continuous characters: A simulation study ...534

MAZER, SUSAN J. Plant population genetics as a research tool. (Book review) ...1536

MAZER, SUSAN J., AND CHARLES T. SCHICK. Constancy of population parameters for lifehistory and floral traits in Raphanus sativus L. II. Effects of planting density on phenotype and heritability estimates ...1888

MCCAULEY, DAVID E. The effect of host plant patch size variation on the population structure of a specialist herbivore insect, Tetrappes tetrapphthalmus ...1675

McHENRY, HENRY M. The human career: Human biological and cultural origins. (Book review)...465

MCLENNAN, DEBORAH A. Integrating phylogeny and experimental ethology: From pattern to process ... 1773

MEFFERT, LISA M., AND EDwiN H. BRYANT. Mating propensity and courtship behavior in serially bottlenecked lines of the housefly . 293

MELZER, A. L., AND J. H. KOESLAG. Mutations do not accumulate in asexual Isolates capable of growth and extinction Muller's Ratchet reexamined ...649

MITCHELL, PAUL, AND WALLACE ARTHUR. Extinction due to evolution of a competitor ... 307

MODI, RAjiv I., AND JULIAN ADAMS. Coevolution in bacterialplasmid populations ...656

MOLLER, ANDERS PAPE. Sexual selection in the monogamous bam swallow (Hirundo rustica). 1. Determinants of tail ornament size ...1823

MOPPER, SUSAN, JEFFRY B. MITTON, THOMAS G. WHITHAM, NEIL S. COBB, AND KERRY M. CHRISTENSEN. Genetic differentiation and heterozygosity in pinyon pine associated with resistance to herbivory and environmental stress ...989

MORAN, NANCY A. Phenotype fixation and genotypic diversity in the complex life cycle of the aphid Pemphigus betae ... 957

MOUSSEAU, TIMOTHY A. Geographic variation in maternalage effects on diapause in a cricket ...1053

MOUSSEAU, TIMOTHY A. Landmarks in morphometrics, or the shape and size of morphometrics to come. (Book review) ...1979

MOYLE, PETER B. Livebearing fishes in evolutionary research. (Book review) ...1060

MULDER, MONIQUE BORGERHOFF. Psychology, culture, and evolution. (Book review)...466

MULVEY, M., J. M. AHO, C. LYDEARD, P. L. LEBERG, AND M. H. SMITH.

Comparative population genetic structure of a parasite (Fascioloides magna) and its definitive host ...1628

NEIGEL, JOSEPH E., R. MARTIN BALL, JR., AND JOHN C. AviSE. Estimation of Single generation migration distances from geographic variation in animal mitochondrial DNA ...423

NiKLAs, KARL J. Flexural stiffness allometries of angiosperm and fern petioles and rachises: Evidence for biomechanical convergence ...734

NORDBORG, MAGNUS. Sexratio selection with general migration schemes:  Fisher's result does hold ...1289

NUR, NADAV. Lifetime reproductive success in birds. (Book review) ...1538

NYLIN, S6REN. The phylogenetic approach to ecology. (Book review) ...1731

ORR, H. ALLEN. Is singlegene speciation possible?...764

OTTO, SARAH PERIN. On evolution under sexual and viability selection: A two locus diploid model ...1443

PAGE, ROBERT E., JR. Tropical bees. (Book review)...469

PAIGE, KEN N., WILLIAM C. CAPMAN, AND PETER JENNETTEN. Mitochondrial inheritance patterns across a cottonwood hybrid zone: Cytonuclear disequilibria and hybrid zone dynamics ...1360

PALUMBI, STEPHEN R., AND BAILEY D. KEssING. Population of biology of the transArctic exchange: MtDNA sequence similarity between Pacific and Atlantic sea urchins ...1790

PAREJKO, KEN, AND STANLEY 1. DODSON. The evolutionary ecology of an antipredator reaction norm: Daphnia pulex and Chaoborus americanus ...1665

PARKER, MATTHEW A. Nonadaptive evolution of disease resistance in an annual legume. . .1209

PAYNE, ROBERT B. Natal dispersal and population structure in a migratory songbird, the indigo bunting ...49

PEAKALL, ROD, AND ANDREW J. BEATTIE. The genetic consequences of worker ant pollination in a selfcompatible, clonal orchid ...1837

PEMBERTON, J. M., S. D. ALBON, F. E. GUINNESS, AND T. H. CLUTTONBROCK. countervailing selection in different fitness components in female red deer ...93

PITNICK, SCOTT, THERESE A. MARKOW, AND MICHAEL F. RIEDY. Transfer of  ejaculate and incorporation of malederived substances by females in , the nannoptera species group (Diptera: Drosophilidae)...774

POLLAK, PEGGY E. Cytoplasmic effects on components of fitness in tobacco cybrids ...785

POMIANKOSWKI, ANDREW, YOH IWASA, AND SEAN NEE. The evolution of costly mate preferences 1. Fisher and biased mutation ...1422

PRICE, TREVOR, AND DOLPH SCHLUTER. On the low heritability of lifehistory Traits. ...853

PRICE, TREVOR, ELLEN CHI, MARK PAVELKA, AND MACE HACK. Population and developmental variation in the feather tip . 518

PROCTOR, HEATHER C. The evolution of copulation in water mites: A comparative test for nonreversing characters ...558

PROMISLOW, DANIEL E. L. Senescence in natural populations of mammals: a comparative study ...1869

RATNIEKS, FRANCIS L. W. Facultative sex allocation biasing by workers in Social hymenoptera... 281

RAWSON, PAUL D., AND THOMAS J. HILBISH. Genotypeenvironment interaction for juvenile growth in the hard clam Mercenaria mercenaria (L.)...1924

READ, ANDREW, AND SEAN NEE. Is Haldane's rule significant? ...1707

RITLAND, DAVID B. Revising a classic butterfly mimicry scenario: Demonstration of Milllerian mimicry between Floriday viceroys (Limenitis archippus floridensis) and queens (Danaus gilippus berenice)...918

RoCHA, OSCAR J., AND ANDREW G. STEPHENSON. Effects of nonrandom seed abortion on progeny performance in Phaseolus coccineus L . ...1198

ROSENBERG, GARY. Aposematism and synergistic selection in marine gastropods ...451

RUBEN, JOHN. Reptilian physiology and the flight capacity of Archaeopteryx ...1

RUZZANTE, DANIEL E., AND ROGER W. DOYLE. Rapid behavioral changes in medaka (Oryzias latipes) caused by selection for competitive and noncompetitive growth ...1936

SANDERSON, MICHAEL J. In search of homoplastic tendencies: Statistical inference of topological patterns in homoplasy ...351

SCHOEN, DANIEL J., AND ANTHONY H. D. BROWN. Whole and partflower self-pollination in Glycine clandestina and G. argyrea and the evolution of  autogamy ...1651

SCHWAEGERLE, KENT E., AND DONALD A. LEVIN. Quantitative genetics of fitness traits in a wild population of phlox...169

SELLA, GABRIELLA. Evolution of biparental care in the hermaphroditic polychaete worm Ophryotrocha diadema ...63

SHAPIRO, ARTHUR M. A myth is as good as a mile. (Book review) ...1061

SHAW, A. JONATHAN. The genetic structure of sporophytic and gametophytic populations of the moss, Funaria hygrometrica HEDW . ...1260

SHAW, RUTH G. The comparison of quantitative genetic parameters between populations ...143

SHAW, RUTH G., AND HELEN L. BILLINGTON. Comparison of variance components between two populations of Holcus lanatus: A reanalysis...1287

SHIELDS, GERALD F., AND THOMAS D. KOCHER. Phylogenetic relationships of  North American ursids based on analysis of mitochondrial DNA ...218

SHINE, RICHARD, AND ALLEN E. GREER. Why are clutch sizes more variable in some species than in others?...1696

SLAGSVOLD, TORE, AND GLENNPETER SAFETRE. Evolution of plumage color in male pied flycatcher (Ficedula hypoleuca): Evidence for female mimicry ...910

SOKAL, ROBERT, R., AND GEOFFREY M. JACQUEZ. Testing inferences about microevolutionary processes by means of spatial autocorrelation analysis . ...152

SOKAL, ROBERT R., ROBERT S. UNNASCH, AND BARBARA A. THOMSON. Pemphigus revisited: Changes in geographic variation but constancy in variability and covariation ...1585

SPERLING, FELIx A. H., AND JOHN R. SPENCE. Structure of an asymmetric hybrid zone between two water strider species (Hemiptera: Gerridae: Limnoporus)...1370

SPITZE, KEN. Chaoborus predation and lifehistory evolution in Daphnia Pulex: Temporal pattern of population diversity, fitness, and mean life history . ...82

SPITZE, KEN, JOHN BURNSON, AND MICHAEL LYNCH. The covariance structure of lifehistory characters in Daphnia pulex ...1081

SPOONER, DAVID M., KENNETH J. SYTSMA, AND JAMES F. SMITH. A molecular reexamination of diploid hybrid speciation of Solanum raphanifolium ...757

STANTON, MAUREEN, HELEN J. YOUNG, NORMAN C. ELLSTRAND, AND JANET M.CLEGG. Consequences of floral variation for male and female reproduction in experimental populations of wild radish, Raphanus sativus L ...268

STEINER, Kim E., AND V. B. WHITEHEAD. Oil flowers and oil bees: Further evidence for pollinator adaptation ... 1493

STRAUSS, RICHARD E. Correlations between heterozygosity and phenotypic variability in Cottus (Teleostei: Cottidae): Character components ...1950

SZYMURA, JACEK M., AND NICHOLAS H. BARTON. The genetic structure of the hybrid zone between the firebellied toads Bombina bombina and B. variegata: Comparisons between transects and between loci . ..237

ToMEKPE, KODJO, AND RoSELYNE LuMARET. Association between quantitative  traits and allozyme heterozygosity in a tetrasomic species: Dactylis glomerata . ..359

TOMIUK, Y~RGEN, AND VOLKER LOESCHCKE. A new measure of genetic identity between populations of sexual and asexual species . 1685

VAN TIENDEREN, PETER H. Evolution of generalists and specialists in spatially heterogeneous environments . .. 1317

VIA, SARA. The genetic structure of host plant adaptation in a spatial  patchwork: Demographic variability among reciprocally transplanted pea aphid clones ...827

VOGL, CLAUS, AND JORGEN RIENESL. Testing for developmental constraints: Carpal fusions in urodeles ...1516

VOIGHT, JANET R. Ligula length and courtship in Octopus digueti: A potential mechanism of mate choice . ..1726

WADE, MICHAEL J. Genetic variance for rate of population increase in natural populations of flour beetles, Tribolium spp ...1574

WADE, MICHAEL J. Adaptation and environment. (Book review) ...1733

WAPALES, ROBIN S. Heterozygosity and lifehistory variation in bony fishes: An alternative view ...1275

WASER, PETER M., AND LEE F. ELLIOTT. Dispersal and genetic structure in kangaroorats . ..935

WASSERMAN, MARVIN, AND HEDA ZWEIG. Sexual preference for females reared on cactus media by Drosophila pegasa males ...433

WAYNE, ROBERT K., SARAH B. GEORGE, DENNIS GILBERT, PAUL W. COLLINS, STEVEN D. KOVACH, DEREK GIRMAN, AND NILES LEHMAN. A morphologic and genetic study of the island fox, Urocyon fittoralis . ..1849

WEDELL, NINA. Sperm competition selects for nuptial feeding in a bush cricket...1975

WENDEL, JONATHAN F., JAMES McD. STEWART, AND J. H. RETTIG. Molecular evidence for homoploid reticulate evolution among Australian species of Gossypium... 694

WEST, KELLY, ANDREW COHEN, AND MICHAEL BARON. Morphology and behavior of crabs and gastropods from Lake Tanganyika, Africa: Implications for Iacustrine predatorprey coevolution ...589

WIENER, PAMELA, AND MARCUS W. FELDMAN. The evolution of dispersal in a model of mixed selfing and random mating ...1717

WIGGINS, DAVID A. Natural selection on body size and laying date in the tree swallow . ..169

WILLIS, JOHN H., JERRY A. COYNE, AND MARK KIRKPATRICK. Can one predict the evolution of quantitative characters without genetics? ...441

WILSON, J. BASTOW, YIN RONGHUA, ALAN F. MARK, AND ANDREW D. Q. AGNEW. A  test of the Low Marginal Variance (LMV) theory in Leptospermum scoparium (Myrtaceae)... 780

WIMBERGER, PETER H. Plasticity of jaw and skull morphology in the neotropical cichlids Geophagus brasiliensis and G. steindachneri ...1545

WOOTTON, J. TIMOTHY, BRUCE E. YOUNG, AND DAVID W. WINKLER. Ecological versus evolutionary hypotheses: Demographic stasis and the Murray Nolan clutch size equation 1947

WRAY, GREGORY A., AND RUDOLF A. RAFF. Rapid evolution of gastrulation mechanisms in a sea urchin with lecithotrophic larvae ...1741

YUND, PHILIP 0. Natural selection on hydroid colony morphology by intraspecific competition... 1564

ZINK, ROBERT M. The geography of mitochondrial DNA variation in two sympatric sparrows ...329