47° 



INDEX. 



Nabidie, defined, 153. 



Nabis fusca, 154. 



Naphthaline against book-lice, 69. 



and its uses, 453. 

 Natural checks to insect increase, 418. 

 Necrophorus, 171. 

 Negro-bug, 163. 

 Nematus ribesii, 372. 

 Nervous centre in flies, 41. 



system of insects, 39. 

 Neuroptera, defined, 53, 54. 



chapter on, 58. 



described, 72. 

 Neuters in ants, 391. 

 Newspaper barriers against borers, 431. 

 Nisoniades, species of, 254. 

 Nitidulidae, 181. 

 Nits of lice, 105. 

 Noctuidae, 288. 

 NotodontidcE, 275. 

 Notolophus leucostigma, 268. 

 Nozzles types of, 456. 

 Nut-weevils, 234. 

 Nymph, defined, 49. 

 Nymphalidae, 242. 



Oak, Edema albifrons on, 277. 



galls, 377. 



leaf-rollers, 321. 



orange-striped worm on, 278. 



pruners, 207. 

 Ocelli, described, 41. 



location of, 22. 

 Ocneria dispar, 270. 

 Odonata, described, 60. 

 Odontota dorsalis, 222. 

 Qicanthus species, 100. 

 Qidemasia concinna, 277. * 

 Otdipodinae, described, 87. 

 Oesophagus, described, 30. 

 CEstridas, 351. 

 Oistrus ovis, 352. 

 Oil of Citronello, 333. 

 Olfactory organs, described, 44. 

 Olfersia, species, 369. 

 Oncideres species, 210. 

 Onion maggot, 363. 



thrips, 102. 

 Ophion species, 382. 



Orange, Aleyrodes on, 122. 



cottony-cushion scale, 108. 



-dog, 253. 



mealy-bugs on, 106. 



oyster-shell scales on, 116. 



red-bug on, 157. 



Termite attack on, 67. 

 Orange-striped oak-worm, 278. 

 Orbicular spot, 289. 

 Orchelimum species, 96. 

 Orcus, 174. 



Orders of insects, 52, 54. 

 Orgyia leucostigma, 268. 

 Ortalids, 365. 

 Orthoptera, chapter on, 79. 



defined, 53, 54. 

 Orthosoma brunneum, 206. 

 Ovaries, described, 46. 

 Oviduct, described, 46. 

 Oviposition of Acridiidae, 89. 



Chrysopa, 74 



dragon-flies, 62. 



field-crickets, 99. 



grasshoppers, 89. 



katydids, 96. 



locusts, 94. 



tree-crickets, 100. 

 Ovipositor, described, 46. 



in crickets, 97. 



of parasites, 379. 

 Owlet moths, 288. 

 Ox-louse, 104. 

 Ox-warble, 352. 



Oxyptilus periscelidactylus, 318. 

 Oyster-shell bark-lice, 115. 



Pain in insects, 40. 

 Pale-striped flea-beetle, 221. 

 Paleacrita species, 308. 

 Palm-weevil, 236. 

 Palpi, structure and function, 16. 

 Pamphila, species of, 254. 

 Panorpida;, described, 77. 

 Paper-making wasps, 406. 

 Papilio asterias, 250. 



cresphontes, 253. 



philenor, 251. 



turnus, 252. 

 Papilionidae, 246. 



