158 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



not much blackened at tip ; hind margin of wing more rounded, mak- 

 ing the wing wider in the middle than it is in the male; anal angle 

 rounded, not very prominent, veins slightly bordered with brown; 

 costa not enlarged at tip of first vein. The bristles of the middle 

 tibiae and tarsi and middle and hind femora as in the male. 



Redescribed from 8 males and 2 females. Tliese were taken at 

 the following locations: Hagerman, and Craigs Mountain, Idaho; 

 South Dakota; Bottineau, North Dakota, June 20, 1918 — -all taken 

 by J. M. Aldrich; Bozeman, Montana, June 4, 1911; Colorado, taken 

 by Baker; 1 male taken at Dauphin, Manitoba, June 22, 1912, by 

 Dr. E. M. Walker, and 1 male at Nelson, British Columbia, July 1, 

 1910. 



Type. — In American Museum of Natural History; from North 

 Park, Colorado. 



No. 109. DOLICHOPUS HASTATUS Loew. 



Dolichopus hastatus Loew, Mon. N. Amer. Dipt. pt. 2, 1864, p. 59. — Aldrich 

 Kansas Univ. Quart., vol. 2, 1893, p. 13. 



Male. — Length 5 mm.; of wing the same. Face rather wide and 

 long, a little narrowed in the middle, pale golden yellow. Front 

 green with bronze reflections and a little yellowish pollen along the 

 orbits. Antennae (fig. 109a) yellow; third joint brown on apical 

 half or more, somewhat orbicular in outline ; arista inserted in a notch 

 on upper edge of third joint, black, its basal joint long and seems to 

 form two thirds of the arista, the remainder seems to be jointed at 

 its basal third, from which joint it is compressed into a fusiform 

 lamella, which is wlfitish at tip and fringed above and below with 

 minute hairs on its edges, making it appear much wider; tliis lamella 

 occupies about half the length beyond the basal joint. Proboscis 

 brown; palpi yellow. Lateral and inferior orbital cilia pale yellow, 

 about ten of the upper cilia on each side black. 



Thorax green, dorsum with the beginings of two dull coppery 

 vittae in front, and dulled with almost invisible brownish pollen, 

 except along the front edge, where the pollen is gray; pleurae dulled 

 with white pollen. Abdomen green with black incisures and slight 

 bronze reflections; the white pollen on its sides abundant and ex- 

 tending upon the dorsum. Hypopygium black; its lamellae of mod- 

 erate size, oval in outline, longer than wide, yellowish wlfite, some- 

 times quite yellow or almost yellowish brown, with a black border, 

 which is wide on apical, narrow on upper margin, jagged and bristly 

 at apex, fringed with delicate black hairs above, 



Fore coxae yellow with a small brown spot at extreme base on 

 outer side; anterior surface clothed on all but its outer edge with 

 little black hairs; the outer edge appears glabrous. Middle and hind 

 uoxae black with yeUow tips. Femora and tibae yellow. Middle 

 and hind femora each with one preapical bristle, the hind not ciliated 



