434 



ANALYTICAL INDEX 



place of Pterodactyles and birds, 18 ; 

 often wingless in oceanic islands, 1 8 ; 

 great size of Palaeozoic, 18, 37; 

 derived from Chaetopod-like an- 

 cestor, 27 ; in classification, 33 ; of 

 the Palaeozoic, 34-8 ; of Commentry 

 Carboniferous, 35-8 ; evolution of 

 wings of, 36, 37 ; small advance of, 

 since Carboniferous, 36-8 ; life-history 

 of Carboniferous, 37 ; pre-eminently 

 fitted for discussion on species, 50-4 ; 

 disturbed by effect of wind, 75 ; cross- 

 fertilization and, 91 ; migration of, 93 ; 

 the struggle for existence and, 117; 

 prophetic instincts of, 1 1 7-19, 1 57-65 ; 

 importance of, for the question of tran s- 

 mission of acquired characters, 139- 

 68 ; supposed transmission of experi- 

 ence, and the warning and mimetic 

 colours of, 166-8 ; struggle for life in 

 young birds, and the warning and 

 mimetic colours of, 167, 167 n. 2, 168 ; 

 importance of, as food, 167, 167 n. 2, 

 168 ; less on wing in dry season, 

 208-11 ; groups of, bury in dry 

 season, 208 ; Prof. J. O. Westwood 

 on resemblances between, 221 ; 

 luxuriance of, in S. America, 248 ; 

 great development of mimicry in, 

 367 ; effects of castration of, 380. 



Instances of variety in the 

 Breed, arising from the operation 

 of external, chiefly of local causes, 

 J. C. Prichard, 187, 188. 



Instances showing the Per- 

 manency of Complexion in differ- 

 ent Baces, J. C. Prichard, 177, 178. 



Instinctive, see instincts. 



Instincts and Habits of the 

 Solitary "Wasps, G. W. and E. G. 

 Peckham, 118 n. 1, 162, 163. 



Instincts of Insects, V. 154-7 : 

 see also 117, 118, 119, 146, 147, 

 157-66. 



Instincts of Cocoon-making, 

 V. 157-60: see also 117, 118, 164, 

 164 n. 2. 



Instincts of the Hymeno- 

 ptera, V. 160-6: see also 118, 119, 

 146, 147. 



Instincts All-Important for 

 Protective Resemblance, X. 301, 

 302: see also 155-6, 289, 298, 300, 

 301, 318- 



Instincts All-Important in 

 Display of Warning Colours, 

 X. 323, 324 : s.ee also 319, 320. 



Instincts All-Important in 

 the Attainment of Mimetic 

 Resemblance, X. 363 : see also 241, 

 319, 341, 368. 



Instincts or Instinct : (see also 

 intelligence), Lloyd Morgan on, 

 154; Fabre on, 160; Lord Ave- 

 bury on, 160, 161 ; G. J. Romanes 

 on, 160, 161, 166; C. Darwin on, 

 161, 165; Eimer on, 162; G. W. 

 and E. G. Peckham on, 162, 163; 

 E. B. Poulton on, 163-5 ! E - Ray 

 Lankester on, 165, 166 ; G. H. Lewes 

 on, 166 ; Lamarckian interpretation 

 of, 116, 154; intelligence and, 116, 

 117; Natural Selection and, 1 16-9, 

 138 ; originated through action of 

 Natural Selection on nervous system, 

 117; more developed in lower 

 animals, 117 ; of sucking, 117; defi- 

 nition of, 154, 301, 302; difficulties 

 of Lamarckian interpretation of, 154- 

 60, 163-6 ; protect from enemies 

 that are never seen, 1 55-60 ; of larva 

 to protect against enemies of pupa, 

 157-60; of Fossorial Hymenoptera, 

 118, 119, 160-4; of Vespa, 164-5; 

 of worker ants, 165 ; least developed 

 in highest animals, 165, 166 ; per- 

 formed but once in a life, 164, 164 

 n. 2; educability versus, 165, 166; 

 relation of daylight to mimetic, 249, 

 250 ; to procrytic, 303 ; Lewes's and 

 Romanes' view that ' lapsed ' in- 

 telligence has produced, 166 : see 

 also 161 ; importance of, in Protective 

 Resemblance, 298, 301-2, 353 ; in 

 Aposematic display, 323-4 ; in 

 Mullerian mimicry no less than in 

 Batesian, 363. 



Intelligence (see also instinct), a 

 criterion in evolution, 107, 108 ; of 

 seal and birds, 116; instinct and, 

 116, 117 : see also 165, 166. 



Intemperance, supposed hereditary 

 effects of, discussed by J. C. Prichard, 

 183, 184. 



Interbreeding, advantages of, 93, 94. 



Interbreeding, Asyngamy a 

 consequence of Preferential, 

 II. 85-8 : see also 65. 



Interbreeding between similar 

 varieties, 85-8. 



Intercrossing, supposed swamping 

 effect of, xl, xln. 3, xli; importance 

 of Mendelian principle in averting 

 swamping effect of, xxxiv, xxxv, xli. 



