Midge galls 



1 A twig swelling on Salix provisionally referred to Rhabdo- 



phaga nodula Walsh 



2 Twig swelling on Salix provisionally referred to the genus Rhab- 



dophaga, adult unknown 



3 Gall of Cystiphora viburnifolia Felt on Vibur- 



num dentatum. Photo by Miss Cora H. Clarke 



4 Gall of Dasyneura gleditschiae Felt on honey locust. 



Photo by Miss Cora H. Clarke 



230 



