172 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



2. Mycomya obtruncata L,oew. 

 1869 obtruncata, Loew, Berl. Ent. Zeitschr. XIII. 139. {Scio- 



phila). 

 Male. Length 3.3 mm. Head fuscous black, lower half of 

 the face paler ; antennae fuscous black, scape as well as the basal 

 joint of the flagellum yellowish; palpi yellowish. Thorax fus- 

 cous black, with black pile, humeri widely yellowish, the lat- 

 eral margins whitish or pale yellowish ; scutellum fuscous 

 black ; upper half of the pleura dusky yellowish, lower half fus- 

 cous. First, sixth and seventh abdominal segments wholly 

 black, the remaining segments yellowish, except for the black 

 apical fasciae of each ; hypopygium small, yellowish. Pile of 

 the abdomen black. Coxae and legs pale yellow, tarsi fuscous. 

 Wings cinereous tinged, veins fuscous ; subcostal vein ends free 

 a little beyond the subcostal crossvein which is placed slightly 

 proximad of the middle of the cell R^ ; the petiole of the media 

 and its fork subequal in length ; the cubitus forks distad of the 

 R-M crossvein. Length of wing 3.5 mm. Halteres pale. Re- 

 corded from District of Columbia. 



3. Mycouiya scquax n. sp. 

 Male. Length 3.5 mm. Slender ; head and antennae brown ; 

 ocellar spot black : occiput, face, palpi and base of antennae 

 yellow; with setae black; intermediate antennal joints about 1.5 

 times as long as wide. Thorax yellow, the 3 dorsal stripes and 

 metanotum pale brown with wide yellow lateral and posterior 

 margins. Hairs pale. The last abdominal segment more prom- 

 inent than the small and inconspicuous hypopygium (fig. 146) 

 yellow, resembling that of ocultans Winn., as figured by Dzied- 

 zicki. Legs long and slender, yellow, fore metatarsus over 1.25 

 times as long as its tibia ; spur of intermediate coxae slender and 

 about half as long as the fore tibia ; setae of hind tibia not twice 

 as long as the diameter of this member. Wings (fig. 103) hya- 

 line, yellow tinged, large veins browrlish yellow, subcosta ends 

 in a stump a little beyond the subcostal crossvein which is placed 

 very near the base of the cell Rj, the latter is large, over twice 

 as long as wide; R^.^, ends at the tip of the wing; the petiole of 

 the media is equal to M. in length, the cubitus forks slightly 

 distad of the R-M crossvein ; the wing is 3.5 mm. in length 

 which is 1.7 times as long as the fore metatarsus. Halteres 

 yellow. 



