INDEX 



References to the plates are given in thicker type 



Acraea, taken by kestrel, 118: 

 A. axina, 122; A. caldarena, 

 122; A. egina, 34, VI. 7; 

 A. encedon, patterns of dif- 

 ferent forms in relation to 

 those of Danais chrysippus, 29, 

 144; typical form of, IX. d; 

 alcippina form of, IX. e ; daira 

 form of, IX. f; ^. halali, 122; 

 A. violae, 33 note; eaten by 

 lizards, 108 ; attacked by birds, 

 110, 117 



Acraeinae, as models for African 

 butterflies, 33 



Adaptation and Natural Selection, 

 61 



Adelpha, 54 



African butterflies, mimicry 

 among, 28-36 



Alcidis agathyrsus, 27, 145, III. 1 



Aletis helcita, 36 



Amauris echeria, 30, 148, VIII. 7; 

 A. hyalites, 30, VI. 2; A. 

 niavius, 30, VIII. 6 



Amphidasys betularia, rapidity of 

 increase in melanic sport of, 

 101 



Anosia plexippus { = Danais ar- 

 chippus), 113 



Anthomysa, 41 



Aporia agathon, 149 



Araschnia levana, seasonal dimor- 

 phism in, 130; typical form, 

 VI. 10 ; prorsa form, VI. 9 ; 

 porima form, VI. 8 



Archonias, 43, 56, 145; A. critias, 

 XI. 10 



Argynnis diana, 47, XVI. 3 ; 

 A. hyperbius, 29; as mimic 

 of Danais plexippiis, 52 ; in 

 mimicry ring, 66, IV. 3, 4 



Artamus fuscus, 112 



Asilid flies, as enemies of butter- 

 flies, 106 



Athyma punctata, 53 



Bates, G. L., on contents of birds' 

 stomachs, 113 



Bates, H. W., on mimicry, 9; on 

 resemblances between unpalat- 

 able forms, 14; on initial 

 yariation in mimetic resem- 

 iDlance, 63; on S. American 

 Pierines attacked by birds, 112 



Bateson, 3 



Belenois, 36 



Bingham, on birds eating butter- 

 flies, 110 



Birds, as enemies of butterflies, 

 109; stomach contents of, 

 113; feeding experiments with, 

 115; colour perception in, 119 



Bowater, on Amphidasys betularia, 

 102, 137 note 



Breeding experiments, with Hypo- 

 limnas dubius,SO ; with Papilio 

 polytes, 84 ; with Papilio mem- 

 non, 89 ; with Papilio dardanus, 

 90; with Psevdacraea eurytus, 

 128 



Bryant, on birds eating butter- 

 flies, 114 



Btichanga atra. 111 



Byblia ilithyia, 122 



