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
BioStor
