INDEX TO INSECTS BY HOST PLANTS 
This index should enable foresters and others not trained in 
entomology to identify many of the insects causing damage to 
particular species of trees or shrubs. Only those insects having 
definite host plants are included. The common names of insects, 
where known, are used; otherwise, the scientific name is given. 
Where more than one page reference is given for an insect, the 
page on which the insect is discussed is in boldface type. 
Acacia: 
borer, twig and bark— 
Cryptulocleptus dislocatus, 253 
borer, wood— 
mesquite borer, -178 
Oncideres pustulus, 192 
Thysanoes fimbricornis, 253 
leaf feeders— 
Cryptothelea gloverii, 413 
sucking insects— 
oleander scale, 101 
Ailanthus: 
ailanthus webworm, 403 
Asiatic garden beetle, 149, 485 
eynthia moth, 297 
Alder (Alnus spp.): 
borer, root and trunk (base)— 
Sthenopis argenteomaculatus, 
413 
borer, wood— 
alder borer, 188 
birch and beech girdler, 201 
fig tree borer, 199 
horntail, Xiphydria 
467 
Oberea pallida, 190 
poplar and willow borer, 218 
Sinodendron rugosum, 145 
flower feeder— 
Xyela sp., 432 
leaf feeders— 
beetles: 
alder flea beetle, 141 
Attelabus rhois, 223 
Chrysomela crotchi, 22, 123 
anterrupta, Papa 
mellipes, 
138 
cottonwood leaf beetle, 138 
Dichelonyx elongata, 149 
moths and butterflies: 
Acrobasis rubrifasciella, 354 
Acronicta distans, 308 
Anacamptodes larvaria, 338 
birch skeletonizer, 409 
Alder—Continued 
moths and butterflies—Con. 
Bruce spanworm, 336 
Eulype hastata, 337 
Evora hemidesma, 360 
Gracillaria pulchella, 409 
Hyperetis amicaria, 342 
large aspen tortrix, 3838 
Lycia ursaria, 342 
Pandemis limitata, 375 
smeared dagger moth, 308 
western tent caterpillar, 330 
sawflies: 
dusky birch sawfly, 462 
elm sawfly, 438, 472 
European alder leaf miner, 456 
striped alder sawfly, 463 
sucking insects— 
Clastoptera obtusa, 74 
Corythucha pergandei, 64 
Myzocallis alnifoliae, 84 
Psylla floccosa, 77 
galeaformis, 77 
woolly alder aphid, 85 
Apple: 
borers, bark and phloem— 
flat-headed apple tree 
165, 478 
Lymantor decipiens, 254 
Scolytus mali, 237 
Synanthedon pyri, 399 
borers, wood— 
beetles: 
apple twig borer, 136 
flat-headed apple tree borer, 
165, 478 
Kulliana cincta, 178 
Lichenophanes bicornis, 136 
Lymantor decipiens, 254 
Pseudolucanus capreolus, 145 
round-headed apple tree 
borer, 187 
Saperda cretata, 188 
stag beetle, 145 
borer, 
561 
