304 ERNEST A. BACK, 



mora with long but slender bristles on the under side, tibias 

 and tarsi with strong bristles, front tibiae devoid of a stout 

 spur at the apex, pulvilli well developed, not unusually thick. 

 Marginal, submarginal and posterior cells open, the anal open 

 or closed in the margin, the fourth posterior with a cross-vein 

 at its base, the fifth separated from the discal by the fourth." 

 Type. — Metapogon gilvipes Coquillett, U. S. N. M., Cat. No. 

 7954. 



As this genus is known to me only by the type material con- 

 sisting of the unique type of gilvipes in poor condition, and a 

 specimen of each sex of punctipennis, I have used the original 

 descriptions. The arrangement of the bristles of the meso- 

 notum resembles much that of Lestomyia, and easily catches 

 the eye. 



SYNOPSIS OF SPECIES. 

 Abdomen yellowish-gray pruinose; hind margins of segment 1, a 

 large triangular spot on segments 2-6, segment 7 entire, 



and genitalia, polished g'il vipes. 



Abdomen polished; segment 1 gray pruinose on base and sides, 

 segments 2-6 each with a gray pruinose spot on the base. 



punctipennis. 

 Metapogon gilvipes. 



Metapogon gilvipes Coq., Proc. Ent. Soc. Wash., VI, 182, 1904. 

 " $. — Length 6.5 mm. — Black; the first two joints of the antennae 

 and the legs, except the tarsi toward their apices, brownish-yellow, 

 the halteres light yellow. Mystax yellowish, its bristles arranged in 

 three rows on lower half of face, bristles of occiput whitish, those of 

 the ocellar tubercle black. Antennal style about one-third the length 

 of the third segment. Bristles of mesonotum black; the hairs very 

 short and sparse; bristles and hairs of hypopleura white; mesopleura, 

 pteropleura and sternopleura bare ; scutellum rather flat, nearly bare, 

 with subapical pair of stout bristles. Abdomen yellowish-gray pruin- 

 ose, the hind margin of the first segment, a large triangular spot on 

 the five succeeding segments, covering nearly the whole of the hind end 

 of each segment in the middle, also the whole of the seventh segment 

 and the genitalia polished. Hairs and tarsi dark brown, tarsal claws 

 black. Wings hyaline; veins and cross- veins beyond base of first sub- 

 marginal cell indistinctly bordered with pale brown; small cross- vein 

 nearly three-fourths of the length of the discal cell." 



Type.—U. S. N. M., Cat. No. 7954. A single female spec- 

 imen in poor condition. 



Habitat. — Los Angeles Co., Cal. 



