380 



INDEX. 



beetles, 91 ; of other insects b'y 

 beetles, 95 ; of insects by species 

 of other orders, 97 ; among the 

 vertebrate,, 99; among snake?, 

 101 ; among tree frogs, 103 ; 

 among birds, 103; among mam- 

 mals, 107 ; objections to the 

 theory of, 108 ; by female in- 

 sects, 110; among Papilionida^ 

 179; never occurs in the male 

 only, 2; 0. 



MOMOTID.E, sexual colouring and 

 nidification of, 241. 



MONTROUZIER, M., on butterflies 

 of Woodlark Island, 152. 



MORAL sense, difficulty as to the 

 origin of, 352. 



MORPIIOS, how protected, 73. 



MURRAY, Mr. Andrew, objections 

 to theory of mimicry, 108. 



MUSCICAPID.E, sexual colouring 

 and nidification of, 245. 



MUSOPIIAGID.E, sexual colouring 

 and nidification of, 242. 



NAPEOGENES, all the species 



\ are miraickers, 85. 



NATURAL selection, the principle 

 stated, 41-43; general accept- 

 ance of the theory of, 46 ; 

 tabular demonstration of, 302 ; 

 outline of theory of, 307 ; its 

 effects on man and animals dif- 

 ferent, 311 ; hardly acts among 

 civilized societies, 330 ; what it 

 can not do, 333 ; cannot pro- 

 duce injurious or useless modi- 

 fications, 334. 



NECTARINEID.E, 254. 



NECYDALIDJJ, mimic Hymenop- 

 tera, 96. 



Nemophas grayi, a Longicorn mi- 

 micked by a Longicorn, 95. 



NESTS of Birds, why different, 

 215 ; of young birds, how built, 

 219; construction of, described 

 by Levaillant, 224; imperfec- 

 tions in, 229 ; influenced by 

 changed conditions and per- 

 sistent habits, 232 ; classification 

 of, according to function, 237. 



NEW FORMS, how produced by 

 variation and selection, 286. 



NEW GUINEA, relation of the seve- 

 ral Papuan islands to, 194. 



NOCTURNAL animals, colours of, 

 51. 



NOMADA, 98. 



OBEREA, species resemble Ten- 

 thredinidae, 96. 



Odontocera odyneroides, 96. 



ODONTOCIIEILA, 97. 



Odynerus sinuatus, 90. 



Onthophilus sulcatus, like a seed, 

 58. 



Onychocerus scorpio, resembles 

 bark, 56. 



ORANGE TIP butterfly, protective 

 colouring of, 59. 



ORCHIS, structure of an, explained 

 by natural selection, 271. 



Orgyia antiqua and 0. gonoatigma, 

 autumnal colours of, 62. 



ORIOLIDJS, 253. 



Ornithoptera priamus, 145, 173 ; 

 0. kelcna, 173. 



Oxyrhopus petolarius, 0. trigemi- 

 nus, 0. formosus, 102. 



CWEX, Professor, on more gene- 

 ralized structure of extinct ani- 

 mals, 298. 



