Vagabond gall, I' c m p h i ij u s \- a l;- a b u n d ii s Walsh 

 I Two L^alls on [poplar twis^' 



Andricus singularis Bass. 



- ^ I'l"''' .'-^'i" '"^ ctls^'c of leaf is this species 



Woolly pine scale, V s c u d o p h i I i p j) i a q u a i n t a n c i i Ckll. 



3 Infested twig 



762 



