Vol. XI] COLE AND LOVETT—LIST OF OREGON DIPTERA 241 



Family MYDAIDiE 



Fig. 19. Leptomydas pantherinus Gerst. 

 These flies resemble the Asilida? in form. They are sup- 

 posed to be predaceous but do not have mouth parts which 

 would bear this out. 



232. Leptomydas pantherinus Gerst. 



Medford, VII; Hood River, VII-25 (Cole). Twelve 

 males and one female taken at Hood River in one day. One 

 male is an allotype in the collection of the California 

 Academy of Sciences. The males were observed flying along 

 the Mt. Hood Railway over sandy ground in the heat of the 

 day. 1919, Proc. Cal. Acad. Sci., Ser. 4, col. IX, p. 228. 



Family THEREVID^ 



Fig. 20. Psilocephala munda Loew 



Comstock called these "stiletto-flies" on account of their 

 general form. The adults resemble robber flies but are not 



