Hylastes—Continued 
seaber, 324 
tenuis, 324 
Hiylecoetus lugubris, 220— 
299 
Hylemya 
506, 537 
Hylobius— 
pales, 285-286 
radicis, 286 
Hylocurus— 
bicornis, 325 
biorbis, 325 
ebaracteristies, 295, 299 
324-325, 326 
harnedi, 325 
langstoni, 300, 325 
rudis, 325 
spadix, 325 
Hylotrupes bajalus, 229, 
230, 241, 248-250, 254 
Hiylurgopinus rufipes, 11, 
295-296, 301, 311, 323, 
509, 608-609 
Hylurgops— 
characteristics, 324 
pinifex, 324 
Hymenoptera— 
characteristics, 541-544 
parasivic =i, 153. 053. 
591-592, 593, 600-619, 
620-621, 627-629, 631- 
632 
Hymenorus— 
discretus, 215 
pilosus, 215 
punctulatus, 215 
Hyperaeschra stragula, 
400 
Hyperaspis binotata, 210 
Hyperetis amicaria, 483 
Hypermallus villosus, 245- 
246 
Hyperparasites, 17 
Hyperplatys, 251 
Hyphantria cunea, 387T- 
388, 585, 612 
Hypoderma— 
bovis, 530 
lineatum, 530 
Hypomolyxz piceus, 286 
Hypophloeus. See Corti- 
cCeUus. 
Hyposoter disparis, 411 
Hypothenemus, 326-327 
Ibalia— 
leucospoides, 600 
maculipennis, 600 
Ibaliinae, 600 
Icerya purchasi, 139-140 
cilicrura, 30, 
Ichneumonidae, 601-604, 
612 
Tchneumonoidea, 592, 601— 
609, 610 
Ichthyura— 
apicalis, 397 
albosigma, 397, 582 
brucei, 397 
ee Sa eee Se a te tt oN ED 
INDEX 
Ichthyura—Continued 
inclusa, 396-397, 532 
strigosa, 397 
Idiocerus, 120 
Incurvariidae, 
502-504 
Insects, forest— 
control, special treat- 
ment 18—60 
defoliating, 34 
effect on— 
annual rings, 8 
composition of grow- 
ing stands, 6 
forest industries, 3-5 
forest plantations, 7, 
28-38 
forest products, 8, 38- 
47 
forest, scenic, and rec- 
reational areas, 3- 
5, 9 
keys to, 69-78 
losses from, 5-6 
natural control, 11-18, 
57-60 
parasitic, 16-18, 29-30, 
57-60, 442, 468, 490, 
507, 526, 530-533, 538, 
541, 562, 587, 591-592, 
593, 600, 601-619, 620— 
621, 629, 633-634 
predaceous, 16, 57-60, 
449, 507, 525, 533-536, 
537, 538, 5389-540, 622, 
629, 632 
prevalence of, 4 
sap-sucking, 35-87, 105- 
A52 
seale, 36, 119, 210 
key to, 107-108 
347, 349, 
Ips 
avulsus, 218, 295, 335 
calligraphus, 218, 295, 
298, 302, 334-335 
chagnoni, 335 
general mention of, §8, 
12, 48, 50;7 198,218; 
295,.301, 313, 317, 333- 
335, 336 
grandicollis, 
334, 335 
longidens, 335 
pini, 298, 302, 385 
Ipthimus, 218 
Tridomyrmex humilis, 627 
Tsomera sericea, 216 
Tsoptera, 85-93 
Tsorhipis ruficornis, 186 
Ttame ribearia, 429 
Ithycerus noveboracensis, 
291 
Itonida— 
anthici, 520 
balsamicola, 509-510 
catalpae, 511 
citrina, 520 
negundinis, 510 
295, 302, 
669 
Itonida—Continued 
ocellaris, 510 
pellex, 513-514 
pinirigidae, 515 
poculum, 516-517 
serotinae, 515 
verrucicola, 520-521 
Itonididae, 507, 508, 509-— 
SPA 
Ixodoidea, 64-65 
Janetiella coloradensis, 
514-515 
Janus— 
abbreviatus, 590-591 
integer, 591 
Japananus hyalinus, 120 
Jassidae, 631 
Kalotermes— 
angustoculus, 91 
approximatus, 90-91 
brevis, 91 
castaneus, 91 
cavifrons, 91 
jouteli, 91 
nearcticus, 91 
schwarzi, 90 
snyderi, 90 
Kalotermitidae, 88 
Katydids— 
angular-winged, 102 
characteristics, 94, 100- 
101 
forktailed bush, 101 
round-headed, 101 
Kermes— 
galliformis, 140 
kingii, 140 
parasite of, 349 
pettiti, 140 
pubescens, 140 
species, 140-141 
trinotatus, 140 
Kiln drying, 41 
Lacebugs— 
elm, 116-117 
oak, 116 
rhododendron, 117 
sycamore, 115-116 
Lachnini, 127-128 
Lachnus salignus, 127 
Lacosoma chiridota, 438 
Lacosomidae, 348, 487-488 
Laemophloeus biguttatus, 
PANE 
Lagoa crispata, 444 
Lagriidae, 220 
Lambdina— 
athasaria, 481, 484, 485- 
436 
athasaria pellucidaria, 
345, 431, 434, 485, 486 
fiscellaria, 431, 434435, 
601 
fiscellaria lugubrosa, 621 
Lamellicornia, 161-185 
Lampra, 394 
Lampyridae, 205-206 
