flatheaded appletree borer, 281 
goldsmith beetle, 272 
gray willow leaf beetle, 262 
graybanded leafroller, 171 
green oak caterpillar, 219 
gypsy moth, 229 
Hyperaeschra stragula, 218 
imported willow leaf beetle, 264 
10 moth, 208 
large aspen tortrix, 168 
large maple spanworm, 199 
luna moth, 207 
maple webworm, 180 
Marmara spp., 131 
Melanolophia canadaria, 191 
mourningcloak butterfly, 174 
Nematus fulvicrus, 406 
limbatus , 406 
oligospilus, 406 
salicisodoratus, 405 
Nevada buck moth, 208 
notched-wing geometer, 196 
Notodonta simplaria, 223 
obliquebanded leafroller, 168 
Oiketicus abbotii, 126 
oriental moth, 177 
Pachybrachis tridens, 266 
pepper-and-salt moth, 200 
Pero morrisonaria, 197 
Phyllocolpa spp., 409 
Phyllophaga crenulata, 269 
drakei, 268 
forsteri, 269 
implicita, 269 
luctuosa, 268 
prunina, 269 
tristis, 268 
Polydrusus impressifrons, 321 
polyphemus moth, 207 
Pontania spp., 409 
poplar dagger moth, 236 
poplar sawfly, 406 
poplar tentmaker, 215 
prairie tent caterpillar, 203 
Pristiphora sycophanta, 404 
Protoboarmia porcelaria indicataria, 
200 
Pyrrhalta tuberculata, 262 
red spotted purple, 175 
redhumped caterpillar, 222 
satin moth, 233 
Schizura ipomoeae, 223 
leptinoides, 223 
shortwinged meadow katydid, 52 
smeared dagger moth, 236 
Sparganothis sulfureana, 161 
spear-marked black moth, 190 
Sphinx luscitiosa, 214 
spiny-elm caterpillar, 174 
spotted tussock moth, 224 
stout looper, 195 
. Striped alder sawfly, 407 
threelined leafroller, 161 
Trichiosoma triangulum, 383 
twinspot sphinx, 215 
unicorn caterpillar, 223 
viceroy, 175 
western tent caterpillar, 204 
white admiral, 175 
willow flea weevil, 334 
willow sawfly, 405 
willow shoot sawfly, 412 
winter moth, 189 
yellow-marked caterpillar, 237 
bark, wood, twigs— 
American dagger moth, 236 
black carpenter ant, 429 
black twig borer, 375 
blinded sphinx, 215 
carpenterworm, 146 
Chrysobothris azurea, 283 
cottonwood borer, 289 
cottonwood leaf beetle, 260 
Dicerca lurida, 284 
Euura spp., 409 
flatheaded appletree borer, 281 
hardwood stump borer, 315 
hornet moth, 141 
leopard moth, 145 
Magdalis salicis, 333 
Marmara spp., 131 
Micracis suturalis, 367 
swainei, 366 
Oberea ferruginea, 300 
Poecilonota thureura, 285 
poplar borer, 295 
poplar-and-willow borer, 334 
poplar-gall saperda, 298 
Pselaphorhynchites aeratus, 319 
cyanellus, 319 
Saperda imitans, 298 
moesta, 298 
mutica, 298 
Synanthedon bolteri, 143 
proxima, 143 
sigmoidea, 143 
Xylotrechus annosus annosus, 312 
buds, shoots, roots— 
Euura spp., 409 
hornet moth, 141 
Phyllophaga crenulata, 269 
drakei, 268 
forsteri, 269 
implicita, 269 
luctuosa, 268 
prunina, 269 
tristis, 268 
Polydrusus impressifrons, 321 
poplar clearwing moth, 141 
Sthenopis thule, 124 
Synathedon proxima, 143 
willow beaked-gall midge, 444 
willow flea weevil, 334 
flowers, seeds, fruits— 
Amphibolips quercusfuliginosa, 425 
sucking insects— 
azalea bark scale, 103 
birch lace bug, 65 
birch margarodid, 90 
black willow scale, 111 
Clastoptera salicis, 74 
Corythucha elegans, 65 
mollicula, 65 
cottony maple scale, 97 
dentate scale, 123 
Dysmicoccus difficilis, 94 
S75 
