NO. 2018. SYNOPSIS OF GENERA OF AGR0MYZID2E—MALL0CH. 149 



pair of dorso-centrals; the costal vein of wing having closely placed, 

 short, black thorns from end of first vein to apex of second, where they 

 become indistinct; first costal division with the normal fringe and 

 only one black thorn at apex of subcostal vein ; subcostal vein indis- 

 tinct, but complete; anal cell complete and distinct, the sixth vein 

 straight, reaching two-thirds to wing margin; costa reaching to 

 fourth vein. 



Type of genus. — Paraleucopis corvina, new species. 



PARALEUCOPIS CORVINA, new species. 



Male. — Metallic blue-black; antennae yellow, sometimes slightly 

 browned; legs yellow, coxse except apices, femora except bases and 

 apices narrowly, and sometimes middle of hind tibiae browned or 

 blackened. Wings whitish, veins yellow; halteres yellow. 



Head in profile; frons flattened, descending toward front, face 

 receding, shghtly concave; frons, viewed from above, almost parallel- 

 sided, glossy black, with a brownish tinge anteriorly, surface with 

 sparse very short pale hairs, breadth barely more than equal to either 

 eye; antennae of rather small size ; arista hairlike, bare; cheeks high, 

 equal at posterior margin, where they are highest, to over one-haK 

 the height of eye at highest part, surface with hairs similar to frons; 

 palpi brown; eyes bare. Mesonotum with very sparse dark setulse 

 on the disk besides the one pair of dorso-centrals; the one bristle 

 present on the sternopleura is situated close to the upper posterior 

 angle and is difficult to see owing to the fact that it is upturned and 

 lies very close to the surface; squamae white; scutellum arched, 

 rounded, four equally strong marginal bristles present. Abdomen 

 subopaque on basal two segments, highly glossy on apical segments, 

 surface hairs pale. Legs stout; mid tibiae with an apical, black, 

 straight spur; all tarsal joints except last one with black bristles at 

 apices on under surface; claws black. Inner cross vein of wing at 

 slightly beyond end of first vein and at sUghtly beyond middle of 

 discal cell; outer cross vein at about its own length from end of fifth 

 vein; last section of fourth vein two and one-half times as long as 

 penultimate section ; third and fourth veins convergent, third ending 

 in wing tip. 



Length.— 1-5 mm. 



Type.— C&t. No. 15755, U.S.N.M. 



Female. — Similar to male in coloration and chaetotaxy. 



Allotype and paratypes.—SsLme number as type. 



Locality. — Kerr Ranch, New Mexico, on Yucca species, April 23, 

 1910 (J. D. Mitchell). One specimen marked "From Raven's nest," 

 same locality, has date 5-4-10, by the same collector. There are in 

 all 14 specimens in the series. 



A single specimen taken by H. Pinkus at Dallas, Texas, May 6, 

 .1910, agrees with the type series. 



