AMERICAN DIPTERA. 331 



dense, pale yellow. Abdomen black, polished, finely and sparsely 

 punctate; segments, beginning with second, clothed with recumbent, 

 silky, golden-yellow hair, growing gradually more dense on each sub- 

 sequent segment; this hair is less dense at the bases of segments 2—5; 

 sides and under side (venter) beset with long yellow hair. Femora 

 black, with white pile; tibiae red, with white pile and black and white 

 bristles; the middle tibiae on the anterior side, before the middle, are 

 ornamented with a conspicuous tuft of black bristles, projecting on 

 each side; hind tibiae with a brownish ring a little before the middle; 

 (fore tarsi above clothed with dense white pile, especially on segment 1. 

 — E. A. B.). Wings feebly tinged with yellowish-brown on the prox- 

 imal two-thirds, the rest hyaline; fourth posterior cell coarctate; anal 

 cell slightly open." 



Type. — M. C. Z. A single male specimen. 



Habitat. — Type locality — "foot-hills of Mariposa County, 

 Cal., on the road to Clark's Ranch, beginning of June." 



Prof. C. W. Johnson possesses a female specimen from Los 

 Angeles Co., Cal., which is 11-12 mm. long. The abdomen is 

 more robust and the wings are tinged at the base and along 

 the middle in front, much as in type male. The tibia? and 

 tarsi are wholly reddish, but as might be expected, there is 

 no brush of black bristles and hair on the middle tibiae. Prof. 

 Johnson also possesses a male from the same locality, the 

 wings of which are a clear hyaline. There is another specimen 

 at the National Museum, also from California. I do not re- 

 gard cirrhatus a good Pycnopogon; it agrees more closely with 

 Heteropogon. 



Mr. P. R. Jones (loc. cit.) states that two males from War 

 Bonnet Canon, Sioux Co., Neb., answer the description in all 

 respects except that the tip of the abdomen is red and the 

 specimens are larger, being about 12 mm. in length. 



STICHOPOGON. 



Stichopogon Loew, Linnasa Ent., II, 499, 1847. 

 Stichopogon Schiner, Fauna Austr., I, 128, 1862. 



Elongate species of from very small to medium size, and, 

 for the most part, very bare; vertex extraordinarily widened 

 (PL IV, fig. 7), evenly, but not deeply depressed, front rounded 

 and hollowed out, saddle-shaped; ocellar tubercle but little 

 projecting. Face short, without protuberance except at oral 

 margin, of moderate breadth, and narrowed above; bristles 



TRANS. AM. ENT. SOC, XXXV. AUGUST, 1909 



