FUNGUS GNATS OF NORTH AMERICA. l8l 



yellow: fore metatarsus i 1-16 times the tibia in length, setae 

 of hind tibia but little longer than the diameter of the member. 

 Wings hyaline, with a yellowish tinge ; veins brownish yellow, 

 subcosta ends in the costa about opposite the middle of the cell 

 Ri which is rather large, about 2.5 times as long as wide; the 

 subcostal crossvein is proximad of the middle of this cell ; the 

 basal section of the radial sector and the R-M crossvein are sub- 

 equal ; Rj;^5 ends at the tip of the wing ; petiole of the media is 

 about 2-3 as long as Mo ; cubitus forks distad of the R-M cross- 

 vein ; the wing is 4 mm. in length, which is 2 1-6 times as long 

 as the fore metatarsus. Halteres yellow. A single specimen 

 taken in ]\Iav bv Mr. Wm. Beutenmuller in the Black Mts., 

 N. C. ' ' 



16. Mycomya appcndiciilata Loew. 

 1869. appendicuJoto, Loev^-. Berl. Ent. Zeitschr. XIII. 139. 



(Sciophila). 

 Male. Length 3.2 mm. Head and palpi yellowish, vertex 

 dusky; antennae fuscous black, the scape and first joint of fla- 

 gellum yellow. Thorax pale yellowish, mesonotum somewhat 

 darker ; pile black. Abdomen fuscous black, the posterior mar- 

 gin of each tergite, yellowish ; the penultimate segment wholly 

 black or with subfuscous margin. Hypopygium small, vellow, 

 with slender lateral appendages, black. Coxae and legs pale 

 yellow, tarsi fuscous black. Wings hyaline, cinereous tinged 

 apically and posteriorly ; cell Rn+3 more deeply tinged ; veins 

 fuscous ; subcostal vein, which is thin and pale basally, ends in 

 the costa ; cell R^ small, the subcostal crossvein is placed proxi- 

 mad of the middle of this cell ; petiole of the media over thrice 

 as long as the cell R^, but scarcely equaling the length of the cell 

 itself; cubitus forks distad of the R-M crossvein. Halteres 

 yellow. The species has been recorded from New York. 



To the above may be added that the fore metatarsus is shorter 

 than the tibia and the middle coxse are provided with spurs. 



17. Mycomya hirticoUis Say. 

 1824. hirticoUis, Say, Long's Exp. St. Peter's River. Appl. 362. 



{Sciophila). 

 Length 3.5 mm. Antennae fuscou=:. the four b?- joints yel- 

 low ; head black, face, mouth and palpi pale yellowish. Aleso- 

 notum with traces of three stripes ; pleura yellow with a brown 



