396 



FOREST ENTOMOLOGY. 



Name of tree or 

 shrub affected. 



Oak 



(evergreen) 



Name of insect. 



ApJiilothrix quadi'ilin- 

 eata. 

 It ulbopimctata 



Andricus ramuJi . 

 Aph iloth ri.v fecunda trix 

 DryopJianta scutellaris . 



II lotigiventris 



!t divisa 



BiorMza aptera 



Teras terminalis . 



Biorhiza renum 

 Cynips Kollari 



Aspidiotus zonatus 



A sterolecanium vario- 

 losum. 



Cossus ligniperda . 



Orgi/ia antiqua 

 Pi/gtera hucephala 



Tortrix viridana . 

 Lithocollctis iiiessaniella 



Nature of injuries. 



Produces small, ovoid, 

 ribbed galls on flowers. 



Produces ovoid, green, 

 smooth, hard galls in 

 Ijuds. 



Produces gall like a ball 

 of cotton on flowers. 



Produces gall wholly en- 

 veloped in leaf scales. 



Produces cherry-like gall 

 on under surface of 

 leaf 



Produces a hard, reddish, 

 striped gall on under 

 surface of leaf. 



Produces small, hard galls 

 on under surface of 

 leaf. 



Produces irregular clus- 

 ters of galls on roots 

 of old trees. 



Produces large, soft, 

 apple-like galls on ter- 

 minal or lateral buds 

 or terminal shoots. 



Produces kidney -shaped 

 galls on veins of leaf. 



Produces marble - like 

 galls on twigs of young 

 trees. 



Circular brown scales of 

 female on stems and 

 small scales of male on 

 leaves. 



Scales produce pitted de- 

 pressions on extreme 

 twigs. 



Larvae Inirrow in stems 

 of old trees. 



Larvae eat foliage 



Larvfe live gregariously, 

 and often defoliate 

 isolated branches or 

 whole trees. 



Larvae often defoliate 

 trees in early summer. 



Larva lives within a 

 "blotch," generally on 

 under side of leaf. 



