KEY TO AMERICAN INSECT GALLS 



137 



ELBGutenmuller 



Fig. 140. 1-3. Cinquefoil axil gall, Gonaspis potentillae Bass. 4-i4- Diastrophus 

 niger Bass. 15, 16. Fusiform stem gall, D. fusiformans Ashm. (After Beutm., Am. Mus, 

 Nat. Hist.) 



