18 PROCEEDINGS OF THE NATIONAL MUSEUM. voi,. 61. 



along the inner side of this row and somewhat beyond. The front 

 tibia almost straight, on the extensor side with a row of short even 

 bristles; on the flexor side a denser row of more erect and shorter 

 little spines, terminating in one which is a little longer; middle and 

 hind femora very slender. Wings long and narrow, uniformly 

 tinged with brown, without any distinct spots. 



Length, 3.8 mm. 



Two females, Fairbanks and Nenana, Alaska. 



Type.—Y2mi\\Q, Cat. No. 25409, U.S.N.M., from Fairbanks. 



