Ptilinus ruficornis, 254 
Bayberry: 
Oiketicus abbotii, 126 
Beech: 
ftoliage— 
Pseudopityophthorus pruinosus, 363 
Scolytus fagi, 356 
Xiphydria tibialis, 411 
Xyleborus ferrugineus, 373 
validus, 374 
Acleris chalybeana, 171 
Asiatic oak weevil, 322 
Bruce spanworm, 189 
Bucculatrix packardella, 129 
Choristoneura fractivittana, 169 
Coleophora alniella, 133 
Colocasia propinquilinea, 237 
dark tussock moth, 228 
Datana angusi, 217 
fall cankerworm, 188 
flatheaded appletree borer, 281 
green oak caterpillar. 219 
Heterocampa biundata, 222 
imperial moth, 212 
io moth, 208 
Lambdina fervidaria athasaria, 199 
locust leafminer, 264 
luna moth, 207 
Macrarocampa marthesia, 222 
maple leafcutter. 125 
maple trumpet skeletonizer. 157 
maple webworm, 180 
Norape ovina, 176 
notched-wing geometer. 196 
Oligocentria lignicolor, 222 
Oligonychus bicolor, 30 
Pandemis lamprosana, 161 
Phyllophaga drakei, 268 
forsteri, 269 
implicita, 269 
luctuosa, 268 
prunina, 269 
Plagodis serinaria, 195 
polyphemus moth. 207 
Prolimacodes badia, 178 
redhumped oakworm. 219 
saddled prominent. 220 
Schizura ipomoeae, 223 
leptinoides, 223 
spotted tussock moth, 224 
Tetralopha asperatella, 180 
unicom caterpillar. 223 
variable oakleaf caterpillar. 220 
walnut sphinx, 215 
Xanthonia decemnotata, 266 
bark, wood, twigs— 
Actenodes acornis. 285 
beech borer, 293 
birch and beech girdler, 310 
birch bark beetle, 362 
Buprestis rufipes, 281 
Chrysobothris sexsignata, 283 
Columbian timber beetle. 369 
Eucrada humeralis, 255 
flatheaded appletree borer. 281 
flatheaded sycamore-heartwood borer. 
283 
leopard moth. 145 
Lichenophanes bicornis, 257 
New York weevil, 331 
oak timberworm, 318 
pigeon tremex. 410 
Platypus compositus, 376 
Xylosandrus germanus, 374 
Xyloterinus politus, 371 
buds. shoots, roots— 
Asiatic oak weevil, 322 
Phyllophaga drakei, 268 
forsteri, 269 
implicita, 269 
luctuosa, 268 
prunina, 269 
Tlowers, seeds, fruits— 
filbertworm, 159 
sucking insects— 
beech blight aphid, 79 
birch lace bug. 65 
birch margarodid,. 90 
Calaphis betulella, 79 
giant bark aphid, 77 
large hickory lecanium, 95 
oystershell scale. 114 
Peliococcus serratus, 94 
Phyllaphis fagi, 79 
Beech, American: 
beech scale, 101 
Hemicoelus carinatus, 253 
Psilocorsis cryptolechiella, 132 
Prilinus ruficornis, 254 
Xyleborinus saxesensi, 374 
Beech, European: 
beech scale, 101 
Beech, Oriental: 
beech scale. 101 
Birch: 
foliage— 
Acronicta distans, 236 
innotata, 236 
interrupta, 236 
ambermarked birch leafminer. 401 
apple-and-thorn skeletonizer. 145 
Ancylis spp.. 158 
Arge abdominalis, 382 
clavicornis, 382 
scapularis, 382 
basswood leafminer, 263 
birch skeletonizer, 128 
bronze birch borer, 128, 277 
cecropia moth. 206 
Charadra deridens, 237 
Colocasia propinquilinea, 237 
crinkled flannel moth, 176 
elm prominent. 222 
elm sawfly. 382 
elm sphinx, 213 
European snout beetle. 320 
fruittree leafroller, 163 
gypsy moth, 229 
Haploa lecontei, 226 
hickory tussock moth, 223 
lappet moth, 206 
linden looper. 193 
locust leafminer, 264 
Lomgarapha vestaliata. 190 
luna moth, 207 
Machimia tentoriferella, 132 
