KEY TO AMERICAN INSECT GALLS 



143 



E.LBeutenmuller 



Fig. 146. Diastrophus galls. l, 2. Blackberry knot gall, D. n e b u 1 o s u s O. S. 3-9. D. 

 t u r g i d u s Bass. (After Beutm., Am. Mus. Nat. Hist.) 



