INDEX 



477 



Ants, destructive to insect-specimens, 

 281 

 and vegetation, special relation 



between, 284 

 Apathus, 70 



Apatura and Heterochroa, resemblance 

 of species of, 384 



Apparent exceptions to law of colour 



and nidification, 133 

 Aquatic birds, why abundant, 25 

 Aqueous vapour of atmosphere, its 

 influence on temperature, 223 

 quantity at Batavia and Clifton, 



224 



Archaeopteryx, 165 

 Archegosaurus, 165 

 Architecture of most nations deriva- 

 tive, 113 



Grecian, false in principle, 114 

 Arctic animals, white colour of, 37, 38 

 plants, large leaves of, 407 

 flowers and fruits brightly 



coloured, 407 

 Areca palm, 252 

 Arenga saccharifera, 250 

 Argus-pheasant, wonderful plumage 



of, 374 



Argyll, Duke of, on colours of wood- 

 cock, 39 



on mind in nature, 141 

 criticism on Darwin's works, 



144 



on humming-birds, 153 

 on creation by birth, 156 

 Arums, 254 

 Asilus, 69 

 Aspects of nature as influencing man's 



development, 176 

 Assai of the Amazon, 250 

 Auckland isles, handsome flowers of, 



408 



Audubon, on the ruby humming- 

 birds, 317, 322 

 Azara, on food of humming-birds, 320 



BALANCE in nature, 32 

 Bamboos, 257 



uses of, 258-262 

 Banana, 254 

 Bananas, wild, 254 

 Barber, Mrs., on colour changes of 

 pupa of Papilio nireus, 345 



Barbets, 297 



Bark, varieties in tropical forests, 243 

 Barometer, range of, at Batavia, 234 

 Barrington, Hon. Daines, on song of 

 birds, 104 



on danger of song and gay plum- 

 age to female birds, 138 

 Batavia, meteorology of, 219 



and London, diagram of mean 



temperatures, 220 

 greatest rainfall at, 235 

 range of barometer at, 234 

 Bates, Mr., first adopted the word 

 "mimicry," 54 

 his observations on Leptalis and 



Heliconidae, 59 

 his paper explaining the theory 



of mimicry, 59 

 objections to his theory, 76 

 on recent immigration of Ama- 

 zonian Indians, 100 

 on climate at the equator, 235 

 on scarcity of forest-flowers on 



Amazon, 264 

 on animal life in Amazon valley, 



271 

 on abundance of butterflies at Ega, 



274 



on importance of study of butter- 

 flies, 277 



on leaf-cutting ants, 282 

 on blind ants, 284 

 on bird-catching spider, 291 

 on use of Toucan's bill, 298 

 on large serpents, 304 

 on the habits of humming-birds, 



318 



Bats, 307 



Bayma, Mr. , on " Molecular Me- 

 chanics," 208 



Beagle, Darwin's voyage in, 455 

 Beauty in nature, 153 

 not universal, 155 

 of flowers useful to them, 155 

 not given for its own sake, 156 

 Beetles, 288 



abundance of, in new forest clear- 

 ings, 290 



probable use of horns of, 372 

 Belt, Mr., on virgin forests of Nicar- 

 agua, 265 

 on aspects of tropical vegetation, 



