a 451 



Parasites or natural enemies : 

 elm scurfy scale. 208". 

 Euonymus scale, 214''. 

 European willow gall midge, 301^. 

 fall webworm, i45*'-4()''. 

 forest tent caterpillar. 21^, ii2'''-i3^. 

 golden oak scale, 33o''-3i*. 

 locust leaf miner, 328'. 

 maple leaf scale, 181*. 

 Xeoclytus erythrocephalus, J2t^. 

 oak caterpillar, yellow striped, 309*. 

 oyster scale, 212". 

 pigeon tremex, 63-. 

 pine bark aphid, 195*. 

 pine leaf scale, 23 1-. 

 Putnam's scale, 227'. 

 round-headed apple borer, 85*. 

 rustic borer, 261'. 

 San Jose scale, 222''. 

 scurfy scale, 216^. 

 spiny elm caterpillar, i6i''-62'. 

 tuliptree scale, 210'^. 

 tussock moth, white marked. 20*-2i^ 



willow slug, yellow spotted, 324". 

 Xylina antennata, 131". 

 Faridae, 32^. 

 Paris green, 34", Tfy^. 

 parorgyiae, Apanteles. 138". 

 Peachtree, insects injurious to: 

 borers : 



flat-headed borer, common, 87-. 

 maple and oak twig pruner, 61^. 

 twig girdler, ijS''- 

 leaf feeders : 



brown tail moth, 164^ 

 forest tent caterpillar, no*. 

 Xylina antennata, 130^ 131*. 

 scale or sucking insects : 

 black-banded scale, 200''. 

 box elder plant bug, 239''. 

 Putnam's scale, 227''. 



I'eartree, insects injurious to: 

 borers : 



flat-headed borer, common, 87-. 

 maple and oak twig pruner, 61^. 

 Xeoclytus erythrocephalus, 72^. 

 pigeon tremex. 63". 

 twig girdler, 273". 

 leaf feeders : 



bag or basket worm, 127*. 

 brown tail moth, 164'. 

 forest tent caterpillar, 107-'. 

 tussock moth, white marked, 136^. 

 Xylina antennata, 131". 

 scale insects : 



oyster scale, 21 1-. 

 Putnam's scale, 227^ 

 Peas, insects injurious to: 

 aphids, 2J2. 



Xylina antennata, 131'. 

 Pecan, twig girdler injuring, 273*. 

 pedalis, Pimpla, 112*. 

 Pemphigus fraxinifolii, ig6-. 

 imbricator, 196-. 

 fMDpuli-transversus, 247^. 

 rhois, 247^^. 



tessellatus, 173'. i95*-96^. 

 ulmifusus. 247*. 

 Pentatomidae, 24^. 

 Pentilia mi."ella, 222^. 



figure, 222. 

 pcriliti, Otacustes, 140'. 

 Perimegatoma variegatum, 140^. 

 Periodical cicada, 173^, 231^-37*. 

 Perissopterus pulchellus, 208^, 231^. 

 perniciosrs, Aspidiotus, see Aspidiotus pcr- 



niciosus. 

 Persimmon, insects injurious to : 

 hickory horned devil, 305*. 

 twig girdler, 273*. 

 Pezomachus insolitus, 140^. 

 Phaeogenes hebe, 166^. 

 Phenacoccus acericola, 49, 172", i82"-86^. 



