INDEX 



Bates, H. W. butterflies of Amazon Valley, 

 51; converger.ee in warning coloration, 

 134; terrifying attitude in caterpillar, 



139- 



Bear, polar, 126. 



Beddard, F. E., 125, 127, PI. 62. 



Bee, carrying pollen, 154 ' color preference, 

 159, 162; evolution of instincts, 76; 

 honey-bee, three types, 22; mimicked by 

 flies, PI. 74 ; mimicked by moths, /'/. 70 ; 

 parasites, 146; protected by stings, 130, 

 135; sacrifice of individuals for benefit 

 of hive, 22; sterility of workers, 23; 

 warning color, 130, PL 74. 



Beetle, Colorado potato-beetle, 131, PI. 6g ; 

 color preference, 162; curculio, 134, 

 PI- 73-' goldenrod-beetle, 131; Her- 

 cules beetle, 51, /'/. 30 , lady-beetle, 131, 

 135, PI. 69, PI. 73; leaf beetle, 123! 

 PL 62; mimicry, 135, 136, PL 73; sex- 

 ual divergence, 51, 52; staghorn beetle, 

 51, PL 29 .' warning color, 131. 



Behring Straits, migration across, 62, 1 12. 



Belt, moss insect, 122, PL 61. 



Biology, Intro, ix, x. 



Bird, confusing coloration, 148; females 

 protectively colored, 50; gastrula, PL 42 ; 

 males serve as decoys, 50; mimicry, 144, 

 PL So; noxious insects, 130; protective 

 color, 118, / '/. 79-5 1 : recognition marks, 

 147, PI. 82 ; segregation, 65; sexual col- 

 oration, 149, 150; sexual phenomena, 

 49-50; sexual selection, 53; skeleton, 

 92, no. 



" Birds of Eastern North America, Hand- 

 book of" (Chapman), 49. 



"Birds of New Guinea" (Gould), PI. 25, 

 PI. 26. 



Birth-rate, 11, 12; relation to struggle for 

 existence, 17. 



Blackbird, sexual coloration, 150. 



Blastomere, 70. 



Blastopore, 101, 102, 103, PL 42. 



Blind fish, 95. 



Blossoms, see Flowers. 



Bluebird, sexual coloration, 150. 



Blue crab, PI. 40. 



Bluefish, 1 18, PL 48. 



Boa constrictor, vestigial limbs, gj. 



Boar, correlation between tusks and bristles, 



36. 



Bobolink, sexual coloration, 150, PI. 22. 

 Bolton, Gambier, PI. 68. 

 Bomlnis vancouverensis, PL 74. 



Bonasa umbel/us, PL 23. 



Borecole, PL 6. 



Bourru, friar-bird and oriole, 144, 145. 



Brassica oleracca. PL j-5 1 ,- rap us, PL g. 



Breeding, in and in, 42; methods used, 29; 



mice (Castle), 44 ; breeding-time and 



segregation, 43. 

 Brehm, 4, 22, 31, 133, PI. 24, PI. 30, PI. 33, 



Pi. 62, PL 99. 



Britcher, H. W., 137, PI. 2, PL 64. 

 Britton, N. L., 88, 89, 90. 

 Broccoli, PL 7, PL S. 

 Bronze, invention of, 176. 

 Brown, Addison, 88, 89, 90. 

 Brussels sprouts, PL 7. 

 Bitfo lentiginosus, PL 66. 

 Bugs, noxious character and warning color, 



131, PL 69. 



Biitomus Hinbt'llatus, PL S6. 

 Butterfly, color preference, 162; confusing 



coloration, 147, PL Sj ; courting, 55; 



leaf butterflies, 123, PL 83; mimicry, 



137, PI- 76, PL 77; sexual coloration, 



51, PL 84; warning color, 131, PL 59, PL 



76, PI. 77, PL 84. 



Cabbage, varieties of, 29, PL 5-8. 



Ciiltiiiii-sia inn/it i/iii, 138, 150, PL 84, 



Calamus arctifrons, PL jS. 



Calf embryo, /'/. jS. 



Callimorpha doininula and liera, PI. 70. 



Callinectes /lastaftts, PL 40. 



Callioin'iinis lyra, PL 32. 



Calocalanus plumulosus and favo, 57. 



Calopteryx macnlata, PL 33. 



Cambrian fossils, 106. 



Cambridge, PL 64. 



"Camera Shots at Big Game" (Wallihan), 

 PL 81. 



Cancer pagurus, 100. 



Capital punishment, 25. 



Carboniferous fossils, 106. 



Cardinal, sexual coloration, 150. 



Carrion flower, 154. 



Castle, W. E., mendelian phenomena, 

 44. 



Caterpillars, protective color, PL 56 : terri- 

 fying attitude, 139, 140, PL 78 ; warning 

 color, /'/. 71. 



Catocnlii a matrix, PL 60 : concumbens, PL 



S3- 



Cauliflower, PL 7, PL 8. 

 Cave-dwelling animals, eyes, 95. 

 Cemophora coccinea, PL 79. 



