INDEX TO ILLUSTRATIONS. 
igaposteinon, modification of hind leg of, fig. 25, 
e, p. 359. 
Anthophora, modification of hind leg of, fig. 25, 
a, p. 359. 
Aphelinus diaspidis, fig. 9, p. 233. ■ 
Aphycus imiuaculatus, fig. 11, p. 236. 
Apis niellifica, wax disks of, fig. 23, a, ft, p. 356; 
modification of hind leg of, fig. 24, A, p. 357. 
Apple branch with San Jose scale, fig. 27, p. 367. 
Aspidiotiphagus citriuus. fig. 6, p. 229. 
Bees, juodifications of hind legs of, fig. 24, p. 357 ; 
fig. 25, p. 359; wax disks of, fig. 23, p. 356. 
Bombus, modifications of hind legs of, fig. 24, C, 
p. 357; wax disks of, fig. 23d, p. 356. 
Chelonus electus, female, fig. 31, p. 372. 
Chelyoxenus xerobatis, fig. 19, p. 309. 
Chinch bug, map showing area ravaged by, fig. 
4, p. 151. 
Coccophagus aurantii, fig. 7, p. 231. 
Coccophagus lunulatus, fig. 8, p. 232. 
Copris gopheri, fig. 20, p. 310. 
Creninops vulgaris, female, fig. 30, p. 371. 
Diaspis lauatus, figs. 12, 13, 14, 15, 16, 17, pp. 287, 
292, 293, 294. 
Erastria scitula, fig. 1. p. 6. 
Hadena fractilinea, fig. 5, p. 155. 
Hessian fly, map showing divergence of two an- 
nual broods of, fig. 3, p. 149 ; table showing an- 
nual cycle of, fig. 2, p. 147. 
Melipona, modifications of hind legs, fig. 24, B, 
p. 357; wax disk of, tig. 23, c, p. 356. 
Melissodes, modification of hind leg of, fig. 25, 
ft, p. 359. 
Modifications of hind legs of different bees, fig. 
24, p. 357; fig. 25, p. 359. 
Nomada, modification of hind leg of, fig. 25, d, 
p. 359. 
Nomia, modification of hind leg of, fig. 25,/, p. 
359. 
Onthophagus polyphemi, fig. 21, p. 311. 
Pear infested with San Jose scale, fig. 26, p. 366. 
Perdita, modification of hind leg of, fig. 25, c, p. 
359. 
Phyllcecus flaviventris, fig. 18, p. 296. 
Phylloxera, inundating vineyard to control, fig. 
22, p. 316. 
San Jose scale, adult female, fig 28, p. 368; 
adult male, fig. 29, p. 369; apple branch in- 
fested with, fig. 27, p. 367 ; pear infested with, 
fig. 26, p. 366. 
Signiphora occidentalis, fig. 10, p. 234. 
Wax disks of social bees, fig. 23, p. 356. 
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