112 



NORTH AMERICAN DIPTERA 



25 



Cecidomyida? VI.— 25, Winnertzia pectinata; 26, Lestremia pini. fifth antennal segment 

 of d ; 27, Cordylomyia brevicornis, fourth and fifth antennal segments ofn". 

 (Courtesy New York State Museum. Albany, N. Y.) 



