174 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



6. Mycomya sp. 

 Male. Length about 3.5 mm. Head yellowish brown, occi- 

 put, face and palpi yellow; ocellar spot distinct, blackish; setse 

 black. Thorax yellow, 3 dorsal stripes dark brown, the lateral 

 abbreviated anteriorly ; scutellum and mesonotum pale brown ; 

 abdomen defective, tergites apparently mainly brown with yel- 

 low along lateral margin; hypopygium as figured (fig. 147). 

 Coxae yellow, middle pair without spur; fore metatarsus .55 

 times as long as its tibia. Antenna, wings and middle and 

 hind legs missing. A specimen taken by Professor Wheeler, 

 in August, in Price Co., Wis. 



7. Mycomya obliqua Say. 

 1824. obliqua, Say, Long's Exped. St. Peter's River, App. 363. 



{Sciophila). 

 Male. Length 3.5 mm. Head black, face, mouth parts and 

 basal joints of antennae yellow ; flagellum fuscous. Thorax yel- 

 low with two oblique brown stripes which meet at the scutellar 

 suture ; a median stripe between these and produced to the 

 collar usually paler brown, and two lateral darker brown stripes 

 abbreviated anteriorly; scutellum except at the suture and dor- 

 sum of metanotum usually dark brown ; a few fine pale hairs 

 on the dorsum ; setse black. Abdomen yellow, the first, sixth 

 and seventh tergites and the posterior third of each of the 

 remaining ones black or dark brown ; hairs pale. Hypopygium 

 (fig. 133) yellow, resembling that of M. lucoruni Winn; supe- 

 rior forceps are broad, and with rounded margins, setose ; the 

 intermediate appendages are long and very slender, doubly sin- 

 uate, somewhat flattened, tapering at the apex and produced 

 beyond the forceps ; the caudal margin of the ventral sclerite 

 is straight, strongly ciliate and with a small rounded protuber- 

 ance on each lateral angle. The legs are yellow and quite slen- 

 der, tarsi slightly darker ; fore metatarsus is ^ as long as its 

 tibia, the larger setse of the hind tibiae are shorter than the 

 diameter of the member. Wings (fig. 102) hyaline, slightly 

 yellow tinged ; subcosta ends in the costa proximad of the distal 

 end of the small cell; subcostal crossvein is placed nearly at the 

 middle of this cell, which is about twice as long as wide; R4+5 

 ends nearly at the tip of the wing; the petiole of the media is 

 longer than Mo ; the cubitus " forks almost directly under the 

 P-M crossvein. Length of wing is 3.5 mm., which is 3.5 times 

 a? long as the fore metatarsus. Halteres yellow. 



