INDEX. 341 
Migration of birds, 1, 143: evidence of, 10, 12, 18, 15, 20, 22, 
24, 29, 144. 
Montagu (Colonel), attributed the singing of birds to the impulse 
of love, 48: supposed that the Cuckoo can retain in the 
uterus eggs perfectly formed, 60, 61: his account of the 
diving of aquatic birds, 166. 
Moulting, of birds, 15, 39: of spiders, 305: process described, 
306. 
Mygale avicularia, living specimens of, brought to Manchester, 
303: tarsal appendages of, described, 303, 304. 
Natterer, M., succeeded in keeping Swallows for several years in 
captivity, 18. 
Neriéne longipalpis, experiment with, 325. 
Nests, in which Cuckoos deposit their eggs, 51: of the Swallow 
and House-Martin examined, 87, 96: various modifications 
of, 127. 
Nets of geometric spiders, how constructed, 277: modifications 
of, 281, 283: fabricated in the dark, 287: composed of 
three kinds of silk, 300. 
Oak, injury done to the foliage of, 209. 
Ovarium of the Cuckoo, 55, 58. 
Owl, White, regarded as an ominous bird, 116. 
Partridge, anecdote of, 93. 
Pearson, Mr., kept Swallows in captivity for several years, 16. 
Pettychaps in its wild state not a mocking bird, 41. 
Physiological fact, a remarkable, 205. 
Poison of Spiders, experiments and observations on, 240, 241, 
244, 247, 253. 
Polysphincta carbonaria, larva of, parasitic on spiders, 233. 
Puffin sometimes deserts its young, 99. 
Pulvilli of insects not suckers, 218, 220: theory of their action, 
222, 223. 
Quail migrates in the night, 24. 
Raven, anecdote of, 132. 
Redbreast, young, experiment with, 38, 39. 
Redwing migrates in the night, 24. 
Rook, nudity of the anterior part of its head and of the base of 
its bill proved by experiment to be a specific character, 161, 
162: frequently plants acorns, 141. 
