134 BULLETIN IIU, UNITED STATES NATIONAL MUSEUM. 



third is an elongated, brown, slightly swollen spot; extreme tip 

 slightly blackened on inner sui'face; in my specimen one of the hind 

 tibiae has an additional brownish band near apical third. Fore tarsi 

 (fig. 886) about one and a fourth times as long as their tibiae; first 

 joint yellow vvdth its extreme upper edge and tip black; slightly 

 enlarged at tip, as long as the remaining four joints taken together; 

 last four joints deep black, of nearly equal length, compressed; second 

 joint about as long as wide at apex; third and fourth joints expanded 

 on upper edge into thin lobes which are nearly as wide as the length 

 of the joints and twice as long, fifth joint also expanded into a lobe, 

 but this lobe is whitish except at its base and half as long as the joint; 

 pulvilli small, white. Middle and hind tarsi longer than their tibiae, 

 black from the tip of the first joint; middle basitarsi with a bristle 

 above at apical fourth. Calypters and halteres yellow, the former 

 with black cilia. 



Wings (fig. 88) grayish, slightly tinged with yellowish brown on 

 costal edge; costa slightly enlarged at tip of first vein, tapering to 

 their tips; third vein running rather close to the second to a point 

 opposite the tip of second where it bends backward in a curve, so as 

 to approach the costa at an acute angle and running nearly parallel 

 with it for a short distance; last section of fourth vein a little bent at 

 its middle, the outer portion a little arcuate; hind margin of wing 

 scarcely indented at tip of fifth vein, but with a deep sinus before the 

 tip of sixth vein and another beyond it so as to leave a large lobe at 

 tip of sixth vein and the anal angle rounded. 



Female. — Face wide, grayish white; third antennal joint nearly 

 orbicular, scarcely pointed, slightly longer than in the male; middle 

 tibiae with two pair of bristles below; fore tarsi a little longer than 

 their tibiae, black from the tip of the first joint, which is as long as the 

 three succeeding joints taken together, fourth and fifth of nearly 

 equal length; third vein separated from second as usual, only a little 

 bent backward at tip; anal angle of wing prominent, beyond this the 

 hind margin is sinuated just enough to suggest the lobe so prominent 

 in the male. 



Redescribed from 1 male taken at Bretton. Woods, New Hampshire, 

 June 30 and 1 female labeled White Mountains, New Hampshire. 



Ty'pe locality .—WhiiQ Mountains, New Hampshire, July 2, In 

 1908 I took a male at Lancaster, New York, which I sent to C. W. 

 Johnson; he determined it as this species, but we could not find the 

 specimen in his collection when I was there on January 17, 1919. 

 No doubt he was correct in the determination; it is the only time it 

 has been reported, except from the White Mountains, New Hamp- 

 shire. 



