476 



INDEX. 



Nabidae, defined, 153. 

 Nabis fusca, 154. 



Naphthaline against book-hce, 69. 



and its uses, 452. 

 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. 

 Nitidulidas, 181. 

 Nits of lice, 105. 

 Nixon nozzles, 458. 

 Noctuidse, 288. 

 Notodontidae, 275. 

 Notolophus leucostigma, 268. 

 Nozzles, types of, 456. 

 Nut-weevils, 234. 

 Nymph, defined, 49. 

 Nymphalidas, 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. 

 CEcanthus species, 100. 

 OSdemasia concinna, 277. 

 OEdipodinae, described, 87. 

 CEsophagus, described, 30. 

 CEstridas, 351. 

 CEstrus ovis, 352. 

 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. 

 Orchehmum species, 96. 

 Orcus, 174. 



Orders of insects, 52, 54. 

 Orgyia leucostigma, 268. 

 Ortahds, 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 periscehdactylus, 318. 

 Oyster-shell bark-hce, 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. 

 Panorpidse, described, 77. 

 Paper-making wasps, 406. 

 Papilio asterias, 250. 



cresphontes, 253. 



philenor, 251. 



turnus, 252. 

 Papilionidas, 246. 



