276 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



one larojc bristle above near apical third ; their inner surface glabrous 

 from the base to apical third; the usual glabrous stripe on upper 

 surface distinct, it is somewhat ])roken by little hairs and does not 

 quite reach the base but extends to the tip. Fore tarsi (fig. 202a) 

 nearly one and three fourths times as long as their tibiae ; first two 

 normal, yellow, second about one-fourth as long as first; last three 

 joints compressed; third joint scarcely as long as second, white, about 

 half as wide at apex as long, fringed above with a few black hairs 

 and with several on the sides and with two long ones at upper apical 

 corner; fourth joint black with a white tip, a little longer than the 

 second, nearly three-fourths as wide as long, fringed above on the 

 black portion with long, dense, black hairs, which give it something 

 of a triangular appearance; fifth joint formed of two parts, the lower 

 part about equal to the fourth joint in size, nearly twice as long as 

 wide, wholly ])lack; upper portion as long as second and third joints 

 taken together, a little less than half as wide as long, black with a 

 brownish luster in certain light and with the apex silvery white, the 

 black portion fringed above with long dense black hairs. Middle 

 tarsi nearly one and a thkd, hind tarsi one and three-fourths as long 

 as their tibiae, infuscated from the tip of the first joint, still the base 

 of the second and third joints quite yellowish. Calypters and halteres 

 yellow, the former with black cilia. 



Wings (fig. 202) grayish, veins brown, inner haH or more of the 

 costa yellow ; costa with a small enlargement at tip of first vein and 

 tapering to its tip; third vein bent backward at tip but tips of third 

 and fourth widely separated; last section of fourth vein a little bent 

 near its basal third; hind margin of wing a little indented at tip of 

 fifth vein; anal angle prominent. 



Female. — Face wide, more white than in the male; fore tarsi plain, 

 yellow, a little infuscated toward their tips, about one and a fourth 

 times as long as their tibiae, second joint slightly more than half as 

 long as the ^rst; third a little shorter than the second and a little 

 longer than the fourth; fifth about equal to the fourth in length; 

 middle basitarsi with one or two very small bristles beyond its 

 middle, usually without a larger bristle above, still there is sometimes 

 a rather small bristle above beyond the middle; costa without an 

 enlargment; third and fourth veins nearly straight beyond the bend 

 in fourth, still the third is bent backward a little at tip. 



Redescribed from the type material in the Aldrich Collection 

 (7 specimens); also 3 males and 2 females from Lawrence, Kansas; 

 1 male taken at Wolfe City, Texas, May, 1906, by F. C. Bishopp; 

 and 2 males taken by K. H. Beamer, 1 in Linn County, Kansas, and 

 the other in Miami County, Kansas. 



Type material taken in Lawrence, Kansas; part is in the University 

 of Kansas, part in the collection of J. M. Aldrich. 



