MUSCOID FLIES FROM THE ANDEAN MONTANYA 31 



front border. Ventral plates with bristles and bristly hairs. Faint 

 wrinkle or very short stump at origin of apical crossvein, apical cell widely 

 open. Claws of male but little longer than those of femzJe, not longer 

 than last tarsal joint or hardly as long. Two strong proclinate orbital 

 bristles in female, none in male. 



Reproductive habit, probably larviposition of colored maggots. 



Type, Eur^thiopsis ochracea, new species. 



Eurythiopsis ochracea, new species. 



Length of body, 9 to 1 mm. ; of wing, 8 to 9.5 mm. One female 

 and two males, Uruhuasi Bridge, San Gaban Canyon, about 6,500 feet, 

 the femeile February 3 and the males February 15, 1910, on flowers of 

 Baccharis sp. 



Head silvery, parafrontals olive-golden, frontalia light brown, first two 

 antennal joints reddish-yellow, third antennal joint and arista black but 

 third joint tinged with reddish at base, especially in female. Palpi yel- 

 low with faint rust tinge, but lighter than basal antennal joints. Upper 

 occiput olive-golden, cheeks with very faint golden tinge in female. 

 Occipital pile pale brassy, cheek and parafacial pile black. Thorax smd 

 pleurae wholly olive-golden, the four vittae sublinear. Scutellum ocher- 

 yellowish, faintly golden pollinose. Abdomen and legs ocher-feddish or 

 reddish-ocher, sometimes ocher-yellowish on sides of first three segments 

 in male ; median depression of first segment broadly black, heavy median 

 vitta on second segment black more or less widened posteriorly ; more or 

 less distinct traces of median black on other segments, being in form of 

 II or U on third segment and V or Y on anal segment. Wings evenly 

 lightly infuscate, very faintly pale at extreme base. Front scale of tegu- 

 lae smoky-blackish ; hind scale smoky-yellowish or at least with yellowish 

 tinge, lighter than front scale. 



Corpulentosoma, new genus. 



General characters of Parag^mnomma as given by Brauer and Von 

 Bergenstamm, but third antennal joint of male greatly vridened and sub- 

 trisuigular, arista subgeniculate, abdomen elongate-subglobose, male with 

 one proclinate orbited bristle, third aristsJ joint only microscopically pubes- 

 cent. Important characters ally it with both Paragymnomma and Cupho- 

 cera, from the latter of which it differs in the third antennal joint being 

 much longer than second, the second joint not being strongly elongate, 

 in the swollen abdomen and the dense subspinelike character of the 



