1280. NEW NORTH AMERICAN DIPTERA—COQUILLETT. 101 



]:)robo,scis about as long as the bod}- hairs of body pale yellow, a 

 large cluster of brown ones at sides of third abdominal segment con- 

 nected by a cross-band of short brown hairs which is prolonged along- 

 middle of dorsum, terminating in a small cluster at tip of abdomen; 

 legs dark brown, under side of hind femora bearing several bristles; 

 wings smoky brown at base, gradually changing to hyaline at the 

 apex, second vein strongly recurved at its apex, its extreme apex 

 nearer base of wing than the preceding part of the recurved portion, 

 the marginal cell strongly widening from base to apex, penultimate 

 section of lower branch of third vein from one-fourth to one-half as 

 long as the last section, small crossvein slightly beyond middle of 

 discal cell; halteres yellow. 



Female. — Like the male except that the hairs of the face are mostl}- 

 pale 3"ellow, the short hairs of the front also of this color, and there 

 are many brown hairs on the mesonotum. 



Length, G to S mm. Two males and two females. 



Ilahitat. — San Bernardino County (April, A. Koebele), and San 

 Diego County (April, D. W. Coquillett), California. 



%7e.— Cat. No. 6191, U.S.N.M. 



GERON SIGMA, new species. 



Male. — Black, the halteres brown, the knobs partly or wholly pale 

 yellow; third joint of antennse less than twice as long as the first two, 

 elongate-ellipsoidal, about three times as long as its greatest width, a 

 distinct notch on upper edge a short distance before the tip; face and 

 frontal triangle grayish pruinose; proboscis about twice as long as 

 length of head, palpi almost reaching its middle; upper side of body 

 opaque, velvety, a transverse pair of gvaj pruinose spots on front 

 end of thorax; wings hyaline, stigma pale brown, branches of third 

 vein as long as the preceding section, the upper branch, except at its 

 extreme l)ase, almost straight, in consequence of which the base of the 

 second submarginal cell is rather pointed, hind crossvein strongly 

 bent S -shaped, small crossvein near one-third length of discal cell. 



Female. — Same as the male, with these exceptions: Front on the 

 lower edge light gray pruinose, the remainder, like the mesonotum, 

 dark grayish black, no gray pruinose spots on the front end of the 

 latter, scutellum light grav pruinose, abdomen brownish, the narrow 

 hind margins of the segments light gray pruinose, stigma of wings 

 pale grayish. 



Length, 2.5 mm. Three males and seven females. 



Ilahitat. — Alabama (C. F. Baker), North Carolina, and Colorado 

 (H. K. Morrison). Three of the Alabama specimens were received 

 for naming from Mr. C. W. Johnson, of Philadelphia, and have been 

 returned to him again 



Tijpe.—Q.^i. No. 6192, U.S.N.M. 



