Aphids or plant lice 

 Painted maple aphid, 1) i c pa n os i {5 h u m acerifolii Thos. 



1 Infested leaves of silver maple 



2 Adult winged specimen very much enlarged 



3 Nearly full grown nymph very much enlarged 



4 Younger nymph very much enlarged 



Chaitophorus ? aceris Linn. 



5 Infested leaves of Norway maple 



6 Wingless female very much enlarged 



Two-spotted lady beetle, Ad all a bi punctata Linn. 



7 Larva ■ 



8 Pupae 



9 Adult 



Woolly beech leaf aphid, Phy 11 aphis fagi Linn. 



10 Infested beech leaf 



11 Nymph much enlarged 



Elm leaf aphid, Cailiptcrus ulmifolii Mon. 



12 Infested elm leaf 



13 Nymph very much enlarged 



14 Winged female very much enlarged 



Transverse poplar stem gall. Pemphigus p o p u I i - 1 r a n s v e r s u s Riley 



1 5 Galls 



16 Section of one showing plant lice within 



Periodical cicada, T i b i c c n s e p t e n d e c i m Linn. 



17 -Side view of adult 



18 Twig showing oviposition scars 



a 358 



