238 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



femora without cilia, but with a row of rather short, dehcate, yellow, 

 closely placed hairs on lower inner edge; the costa is not enlarged 

 at tip of fifth vein; the anal angle is not quite so prominent as in 

 the male. 



Redescribed from 4 males and 5 females taken at Socorro, New 

 Mexico, by S. W. Williston, all in the collection of J. M. Aldrich; 

 1 male taken by E. P. Van Duzee at Santa Cruz, Island, California; 

 1 male taken at Salt Lake, Utah, June 26, by H. S. Barber and in the 

 United States National Museum ; and 1 I took at Fresno, California, 

 May 6, 1915. T. N. Willing took a female at Point Albert, Regina, 

 June 19, 1905. 



[The type, a female from Laguna, California, in the collection of the 

 Department of Zoology, Pomona College, was sent me for examination, 

 and from characters then noted I identified the Socorro material. — J. 

 M. A.] 



No. 174. DOLICHOPUS AURIFACIES Aldrich. 



Dolichopus aurifacies Aldrich, Kansas Univ. Quart., vol. 2, 1893, p. 20. ' 



Male. — Length 4.8 mm.; of wing 4 mm. Face moderately wide, 

 narrowed below, golden yellow. Front shining green or blue-gi*een. 

 Antennae (fig. 174a) yellow; fii'st joint rather slender; third a little 

 longer than wide, conical in outline, pointed at tip, which is more or 

 less infuscated; arista longer than the antennae, black, its first joint 

 unusuallj^ long, about one-fourth of its entire length. Lateral and 

 inferior orbital cilia yellowish, only two or three of the upper cilia 

 on each side black. 



Thorax green; dorsum dulled a little with coarse brown pollen, 

 with a small coppery spot on each side al^ the suture; pleurae dulled 

 with a little yellowish gray pollen. Abdomen green with bronze 

 reflections; the white pollen on its sides abundant and extending 

 upon the dorsum. Hypopygium black; with green reflections on 

 basal portion; its lamellae (fig. 174&) large and inserted near apical 

 third, somewhat elliptical in outline, but narrowed into the stem, 

 whitish with a narrow black border on upper and apical margins, 

 and with numerous brown dots on the disk, jagged and bristly at 

 apex, fringed above with delicate short brown hairs, below with a 

 few pale hairs. 



Coxae yellow, middle pair with two blackish spots on outer sur- 

 face ; fore coxae with minute yellowish hairs on the anterior surface. 

 Femora and tibiae yellow. Middle and hind femora each with one 

 preapical bristle, the latter without cilia below. Posterior tibiae 

 thickened; the usual glabrous stripe on upper surface distinct but 

 does not reach the tip, being terminated by the uniting of the two 

 rows of large bristles, inner surface with another glabrous stripe, 

 which is wide at base, narrow at tip, reaching the entire length of the 

 tibia. Middle tibiae with one large bristle below, their basitarsi 

 without a bristle above. Fore tarsi one and a half times as long as 



