AMERICAN DIPTERA. 329 



Habitat. — California (type); Mt. Hood, Oregon, and Colo- 

 rado (D. W. Coquillett); Florida (C. W. Johnson). 



Dr. S. W. Williston has referred this species to Pycnopogon, 

 but if Mr. Coquillett's determination is correct, it should re- 

 main under Heteropogon. There are two specimens at the 

 National Museum. See note under hidius. 



Heteropogon vespoides. 



Anisopogon vespoides Bigot, Annales, 1878, 423. 



rf. — Length 24 mm. — Translation. — Black, with yellow markings; 

 antennas fuscous, brown at base; face yellowish, mystax and beard 

 testaceous; thorax pale yellow; median stripe, two side spots, black; 

 pleurae black, variegated with yellow; scutellum pale yellow, halteres 

 fuscous; abdomen yellow, the five stripes broad at base black ; gen- 

 italia tawny; tibiae tawny; femora above broadly black; wings pale 

 yellow, veins tawny at base. 



Varied with black and yellow; the black antennae brownish at 

 base ; mystax, hair of palpi and the beard yellowish ; pile of the 

 occiput red ; face pale yellow. Thorax yellow, a median band, and 

 on each side two large trapezoidal spots, black; scutellum yellow; 

 sides with varied reflections and blackish sutures, on the posterior 

 margin with some red bristles. Halteres testaceous. Abdomen yel- 

 low ; five large transverse bands at the base of the segments black. 

 Coxae black with yellow pile; legs of reddish-yellow; femora on the 

 outside and above blackish ; bristles yellow. Wings of a very pale 

 yellowish color; veins brown, yellow at base. 



Type. — Collection of Bigot. 



Habitat. — California (type) . 



I do not believe that this species is known to recent collect- 

 ors. As no structural characters are given, we rely upon 

 Bigot for its generic position. 



PYCNOPOGON. 



Pycnopogon Loew, Linnsea Ent., II, 526, 1847. 

 Pycnopogon Schiner, Fauna Austr., I, 136, 1862. 



Species with broad hairy bodies. Head broad, not nar- 

 rowed above, swollen but without gibbosity, the very thick 

 mystax extending up to the antennas. Antennas very slender, 

 nearly approximate, first two segments cylindrical, subequal, 

 the third elongate, tapering and bearing distally a long, very 

 slender, tapering style. Front somewhat broader above, on 

 the vertex very much depressed with the ocellar tubercle well 



TRANS. AM. ENT. SOC, XXXV. (42) AUGUST, 1909 



