snow: AMERICAN PLATVPKZID.^. 151 



fusco-cinereous-black; four front tarsi lutescent except last two 

 joints; hind tarsi very similar to that of P. cakeata, female (PI. 12, 

 fig. 3). Halteres yellow. Wings hyaline, with very slight fuscous 

 tinge; veins fuscous; second costal and first basal cells subequal; 

 second basal cell one-half the length of first; posterior crossvein near 

 wing-border; second posterior cell moderately long; posterior branch 

 of fourth vein extending nearly to margin of wing. 



Length 3 mm. 



Two specimens, Hop Canyon, Magdalena Mts., N. M., about 

 8,000 feet, August. 



This species has a superficial resemblance to P. egrcgia but differs 

 principally in the black abdominal triangles being posterior rather 

 than anterior, and in the venation. 



CALLOMYIA. 



The American species of this genus hitherto described are divergens 

 Loew and notaia Loew, from Pennsylvania; talpula Loevv, from New 

 Hampshire; tenera Loew, from New York; and bella Will., from 

 Mexico. In addition to these Scudder has described"^ a fossil 

 Callomyia from Green River, Wyoming, C. torporata. 



Callomyia venusta n. sp.— PI. 12, figs. 9 and 10. 



Male, female. Head black, ashy sericeous. Antenna fuscous 

 black, third joint short-conical; proboscis and palpi yellowish red; 

 occijjut with black pile, in male covering most of its surface, in fe- 

 male confined to the orbital row. , Thorax globose, velvety black; 

 two large lateral gray sericeous spots in front, and a broad prescu- 

 tellar band of same color; dorsum in middle with two rather narrow, 

 less opaque stripes. Scutellum velvety black with several long black 

 bristles on border. Pleurre gray sericeous. Abdomen velvety-black 

 except tlie second and third segments and the posterior half of the 

 first, which are orange-yellow; first, second and fifth segments with a 

 silver.y sericeous coating, less marked in the male; pile of abdomen 

 long, black, scattered, thicker in male. Legs in the female yellow; 

 four front tarsi black on the last three or four joints; hind femora 

 with blackish preapical spot; hind tibiae and tarsi fuscous-black; legs 

 of male darker, the front and middle legs infuscated and the hind 

 femora fuscous black. Halteres saturate reddish-orange. Wings 

 hyaline with very slight yellowish tint. 



Length 33- to 4 mm. 



Two males and two females. Hop Canyon, Magdalena Mts., N. M., 

 8000-9000 feet, latter part of July and August. Found running 



*Tertiai-y lu.sect.s of N. A. . p. .n.'i.'i. 



