256 MAINS AGRICUIvTURAI, i;XPERIME;nT STATION. I909. 



greater than the petiole. The legs in the type specimen at Cam- 

 bridge are more or less broken. 



10. Platyura jmllata Coquillett. 



1904. pullata Coquillett, Proc. Ent. Soc. Wash. VI, 171. 



Female. Length 3-|- mm. Black, the mouth parts, sides of 

 mesonotum, the scutellum, metanotum, hind margins of the 

 abdominal segments, the genitalia, venter, coxse, femora, tibiae, 

 bases of tarsi, and the halteres, yellow; hairs and bristles chiefly 

 black. Thorax thinly gray pruinose, the abdomen polished. 

 Wings hyaline, apex of the subcosta opposite the base of the 

 radial sector, the subcostal crossvein near one-fourth of distance 

 from the humeral to the apex of the subcosta, R2+3 very oblique 

 terminating about its own length beyond the apex of Ri, anal 

 vein prolonged to the wing margin. Claremont, Calif. 



II. Platyura nigrita n. sp. 

 Male. Length 4^ mm. Head black, palpi, mouth parts^ 

 antennae including scape, fuscous, intermediate antennal joints 

 longer than broad. Thorax subopaque, brownish black, the 

 collar, humeral spots and narrow lateral margin of mesonotum 

 yellowish ; scutellum brownish, sparsely setose ; the three nar- 

 row longitudinal rows of setulae extending nearly to scutellum 

 and a wider row on each lateral margin extending to base of 

 wing. Abdomen brownish black, subshining; posterior margin 

 of some segments on dorsum faintly on venter more distinctly 

 yellowish. Hypopygium (fig. 92) small, black. Legs yellow,, 

 tarsi apparently more dusky due to setulse; middle and hind 

 tibiae each with several rows of very short and small setae, 6 to- 

 10 in a row ; fore claws with 2 teeth near base ; fore metatarsus 

 about 2-3 as long as its tibia. Wing hyaline, apex very slightly 

 darker, veins yellow except the radius which is brown ; sub- 

 costa ends before the base of the radial sector ; R2+3 oblique, 

 coalesced part of media about half as long as the petiole, anal 

 vein reaches the margin of the wing. Halteres yellow. Taken 

 at Friday Harbor, Washington, in June by Professor Aldrich. 



