INDEX. 405 



INDEX TO Mr. DARWIN'S POSTHUMOUS ESSAY. 



Alison, on instinct, 357, 367, 370, 375. 



Ambli/)-hi/nc7iu.<t, tameness of, 361. 



Angoumois moth, double instincts of the, 373. 



Antelopes, migrations of, 381. 



Ants, ceasing to more eggs when heat is supplied to them, 368; instincts of 



white, 376. 

 Artamiis sordidus, rariations in nest-bnilding instincts of, 372. 

 Audubon, on nidification of G-uUs, 369, and of Sterna miniita, 372. 



B. 



Bachman, on migrations of the bison and Canada geese, 356 ; on migrations 



of squirrels, 380. 

 Banks, Sir J., an changed instincts of a spider, 373. 

 Barrington, Hon. Daines, on wildness of large birds, 362. 

 Beaver, habitations of the, 372. 

 Bechstein, on migratory and non-migratorj thrushes, 355; on variations in 



the singing of nightingales, 374. 

 Bees, instincts of, in making queens. 376 ; in ventilatinsr hives, 378-9 ; mis- 

 taken instincts of, 382-3 ; variation in instinct of, 372-3 ; pillaging each 



other, 375. 

 Birds, migratory habits of, 355-9 ; tameness of, in islands unfrequented by 



man, 360-63 ; nidification of, 364-72 ; variation of instinct in, 374 ; 



instincts of small in mobbing hawks, 382. 

 Bison, migrations of the, 355, 381. 

 Bizcacha, instincts of the, 379. 

 Blackbirds, nidification of a pair of, 371. 

 Biackwal], on nidification, 371 ; on magpies not imitating sounds when in a 



state of nature, 374-5 ; on nidification of a yellow bunting, 371. 

 Blytli, on instincts of removing mutings, &c., from nests, 379 ; on the wild hen 



cackling over her eggs, 381. 

 Bonnet, on double instincts, 373-4 ; on instincts of ants, 368. 

 Botton, on nidification, 369. 



Bourgoanne, on migratory instinct of sheep in Spain, 358. 

 Brent goose, migratory impulse of a worn out, 356. 

 Brougham, Lord, on instincts of chickens, 374. 

 Bruce, on instincts of the Bee-cuckoo, 382 ; on instincts of the Abyssinian 



pigeon, 379. 

 Bucli, von, on animals dying in the Solfortara of Java, 380. 

 Buffalo, migration of the, 355-6. 

 Burrowing, instinct of, 372. 

 Butcher-bird, nidification of the, 382. 



