THE CANADIAN ENTOMOLOGIST. 273 



Prosopis varifrons Cresson. 

 St. John, July 18, two males. 

 Nerepis, Aug. 18, 19, two females. 



Prosopis zizicB Robertson. 

 Nerepis, July 22, Aug. 19, two males. 



THREE NEW NORTH AMERICAN DIPTERA. 



BY J. R. MALLOCH, BUREAU OF ENTOMOLOGY, WASHINGTON, D. C. 



Chcetonenrophora macateei, new species. 



Male: Black, shining, but not glossy. Palpi and legs more 

 or less brownish. Halteres black. 



Frons about one and two-thirds as wide as its length at centre; 

 lower row of bristles convex; surface with numerous short hairs; 

 antennae normal; proboscis normal; palpi of moderate feize, numer- 

 ously bristled; one large downwardly directed bristle on posterior 

 margin of cheek, besides the numerous smaller cheek bristles. 

 Mesonotum with one pair of dorso-centrals; scutellum with four 

 equal sized bristles. Second and fifth segments of abdomen elon- 

 gated; hypopygium large, knob-like, anal protuberance slightly 

 projecting, with several short bristles. Legs strong; fore tibia 

 with one strong bristle at about middle, mid tibia with two at be- 

 fore basal third, one antero-dorsal and one almost dorsal, and one 

 anterior bristle at near apex; hind tibia with one dorsal bristle at 

 about one-third from base, one antero-dorsal at about same distance 

 from base, and an antero-dorsal one at near to apex. Wings clear, 

 veins yellowish; third vein bristled to fork; fork of third vein acute; 

 first costal division equal to 2-3 together; fourth vein leaving at 

 beyond fork of third with a decided curve. 



Length, 4 mm. 



Locality: Plummer's Island, Maryland, April 23, 1913 (A. K, 

 Fisher), one specimen. 



Near to ciirvinervis Becker, but differing in the bristling of the 

 hind tibia and some minor particulars. 



Female similar to male, except in form of abdomen. The 

 sixth segment in this sex is distinctly the longest and the apex of 

 abdomen is rather pointed. Same data as male. 



This species is dedicated to W. L. Macatee of the Bureau of 

 Biological Survey, in whose collection the types are. 



August, 1913 



