184 MAINE AGRICULTURAL EXPERIMENT STATION, I9IO. 



fuscous, the latter covered with white pubescence. Head back 

 of the insertion of the antennae opaque black. Thorax very con- 

 vex; dorsum with scattered long- black hairs, the center reddish 

 from the confluence of obsolescent stripes. Scutellum short and 

 broad, bearing 4 bristles. Abdomen dull pale yellow, clothed 

 with black hairs; posterior margins of segments infuscated. 

 Legs pale yellow ; median coxa with a large fuscous spot at the 

 apex ; tibiae apeparing darker than the femur because covered 

 with denser black hairs. Tarsi infuscated towards their tips. 

 Fore metatarsus 0.8 as long as the tibia; setae of hind tibia 

 no longer than the diameter of this member. Wing gr.iyish 

 hyaline, with yellowish veins ; subcosta ends in the costa about 

 opposite the distal end of the cell R^, which is nearly twice 

 as long as wide ; subcostal crossvein is near the base of this 

 cell ; R^^j ends before the tip of the wing ; the petiole of the 

 media is as long as Mo ; the cubitus forks distad of the R-M 

 crossvein ; the wing is 3 mm. long, which is twice as long as 

 the fore metatarsus. Milwaukee Co., Wis. (Prof. Wheeler, 

 col.). 



A female specimen from the Black Mts., N. C, taken in May 

 by Mr. Wm. Beutenmuller differs in having dark thoracic stripes 

 and tergites with darker posterior margins ; the cell R-^ also is 

 slightly shorter and more distinctly trapezoidal. 



22. Mycomya onusta Loew. 

 1869. onusta^ Loew, Berl. Ent. Zeitschr. XIII. 138. (Sciophila). 

 Female. Length 3.7 mm Yellowish, pilose, the setae black- 

 ish, the hairs pale. Head yellowish, vertex dusky ; scape pale 

 yellow, flagellum fuscous black, the first joint of the latter some- 

 times pale yellow ; palpi subfuscous. Mesonotum with two wide 

 stripes, abbreviated anteriorly, and between them anteriorly may 

 be seen the beginning of a subfuscous median stripe; disk of 

 scutellum subfuscous ; pleura with subfuscous spots. Apical 

 half of each tergite fuscous black. Coxae and legs pale yellow ; 

 tarsi fuscous. Wings uniformly cinereous, veins fuscous; sub- 

 costal vein which is paler and more slender than the other veins 

 is thickened and darkened at the extremity and ends in the 

 costa ; cell R^ is large, the subcostal crossvein is placed at the 

 middle of this cell; petiole of the media is nearly 1.5 times as 

 long as the cellRi, and less than half as long as M^', cubitus 

 forks proximad of the R-M crossvein. Length of wing 3.8 mm. 

 Recorded from the District of Columbia. 



