Vagabond gall, P e m p h i g u s v a g a b u n d u s Walsh 



1 Two galls on poplar twig 



Andricus singiilaris Bass. 



2 Upper gall on edge of leaf is this species 



Woolly pine scale, P s e u d o p h i 1 i p p i a quaintancii Ckll. 



3 Infested twig 



762 



