FUNGUS GNATS OF NORTH AMERICA. I43 



over 3 times as long as from the latter to the tip of the sub- 

 costa ; the subcostal crossvein is situated slightly proximad of 

 the middle of the small cell R^, which is about 1.5 times as long 

 ao wide ; the petiole of the media is less than half as long as 

 the R-M crossvein ; the strong anal vein ends about opposite the 

 fork of the cubitus and slightly distad of the apex of the sub- 

 costa. Halteres yellow. 



One specimen. Rigaud, Canada. June 25. 



12. Sciophila fasciata Say. 

 1823. fasciata, Say, Journ. Ac. Phil. III. 26. 



1878. fasciata, Osten Sacken, Catalog. Diptera. (Lasiosoma). 

 Length 6 mm. Yellow species ; antennae yellowish, brown 

 apically ; vertex brown. Mesonotum with pale brown longi- 

 tudinally divided median stripe narrowed and abbreviated pos- 

 teriorly; lateral stripes reddish brown abbreviated anteriorly; 

 over the base of the wing with another smaller and less con- 

 spicuous stripe ; pleura with a brown spot over each coxa, these 

 spots arranged in a triangle, the lowest itself triangular. Ab- 

 dominal segments with brown posterior margins. Wing slight- 

 ly yellowish. Tibiae and tarsi slightly infviscated. Recorded 

 from Pennsylvania, Maryland, and New Mexico. 



13. Sciophila hirta Meigen. 

 1818. hirta, Meigen. Syst. Beschr. I. 251. 



1863. hirta, Winnertz, Verb. Zool.-bot. Ges. Wien. XIII. 749 



{Lasiosoma) . 



Male and female. Length 3 to 4.5 mm. Shining black, or 

 fuscous, including antennae, palpi and tarsi ; halteres, coxae, legs, 

 and body hairs yellow. Wings fuscous tinged ; cell R^ small, 

 square ; subcostal crossvein placed at or slightly proximad of 

 the middle of this cell. Fore metatarsus 13-16 as long as the 

 tibia. 



This form which has been recorded from Greenland may be 

 distinguished from other dark colored species by its wholly 

 black antennae, and by the location of the subcostal crossvein 

 with respect to the small cell. 



14. Sciophila popocatepetli Bellardi. 

 1859. popocatepetli, Bellardi. Saggio di Ditt. Messicana. I. 211. 

 Female. Length 6 mm., expanse of wings 17 mm. Black, 

 cmereous poUinose ; humeri, lateral stripes and obsolete spot at 



