188 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



and hind femora each \\dth one preapical bristle, the latter without 

 cilia below, but with minute yellow hairs on lower inner edge. Middle 

 tibiae distinctly swollen at tip on ,the front side, this swollen part 

 glabrous, shining and whitish opalescent. Hind tibiae a little 

 infuscated at tip on inner side; there are about six large bristles in 

 each row on upper surface, the glabrous stripe between these rows is 

 broken l)y a few little hairs, inside of the inner row is another glabrous 

 line. Fore and middle tarsi about as long as their tibiae, infuscated 

 from the tip of the first joint, still the base of the second and third 

 joints are often yellow; first joint nearly as long as the three following 

 joints taken together; fourth and fifth of nearly equal length. Hind 

 tarsi wholly black. Calypters and halteres yellow, the former with 

 black cilia. 



Wings (fig. 131) grayish, sometimes a little tinged with yellowish in 

 front; costa scarcely enlarged at tip of first vein; last section of fourth 

 vein a little bent before its middle; hind margin of wing scarcely in- 

 dented at tip of fifth vein, but with a deep, wide sinus between the 

 tips of fifth and sixth veins, the hind margin being nearly parallel 

 with the fifth vein for some distance, and forming a large lobe at tip 

 of sixth vein which includes the prominent anal angle. 



Female. — Face wide, grayish white; antennae as in the male but 

 shorter; middle tibiae normal at tip, and with one large bristle below, 

 their basitersi without a bristle above; wings (fig. 131&) normal, the 

 hind margin rather evenly rounded, the «nal angle not very promi- 

 nent, rounded. 



Redescribed from 12 males and 5 females. One male was taken at 

 Franconia, New Hampshire, and 1 female taken at Machias, Maine, 

 July 26, by C. W. Johnson; I have taken 10 males and 2 females in 

 Erie County, New York, May 31-July 4, and 1 female at Kearney, 

 Ontario, July 3; H. S. Parish took 1 pair at Waubamic, Ontario, 

 June 14. 



Type locality. — Illinois. 



Type. — In Museum of Comparative Zoology, Cambridge, Massa- 

 chusetts. 



No. 132. DOLICHOPUS FLAVICOXA, new species. 



Male. — Length 3.75-4.25 mm.; of wing 5 mm. Face quite wide, 

 its sides nearly parallel, silvery white. Front violet, more green along 

 the orbits. First antennal joint yellow, the upper edge sometimes 

 black or the upper half may be infuscated, but scarcely black; second 

 and third joints black, the latter but little longer than wide, rounded 

 at tip. Lateral and inferior orbital cilia whitish, about six of the 

 upper cilia on each side black. 



Thorax green with bronze refiections; in one specimen the posterior 

 portion of the dorsum and the scutellum are mostly violet; dorsum 

 dulled with gray pollen; pleurae with white pollen. Abdomen green 



