FUNGUS GNATS OF NORTH AMERICA. I39 



mate) near the tip. Coxae yellow, trochanters with conspicuous 

 black spot at the tip, legs yellow, tarsi somewhat infuscated. 

 Flexor surface of fore tibiae with about 8 black setae; middle 

 tibia with about 6 on the flexor surface, 6 on extensor surface 

 inwardly, and 4 longer ones outwardly, the last nearly as long 

 as the diameter of the tibia ; hind legs with 4 on inner lateral 

 surface, 8 on inner extensor surface, about 12 on outer extensor 

 surface in 2 rows, the longest a little longer than the diameter of 

 the tibia ; empodium bushy ; claws each with a single tooth ; fore 

 metatarsus about 0.9, the second tarsal joint about 0.5, the wing 

 about 3 times as long as the tibia. Wings yellowish hyaline, 

 veins dusky yellow ; distance from humeral crossvein to the 

 subcostal crossvein about 0.2 greater than the distance from the 

 latter to the tip of the subcosta ; small cell nearly rectangular, 

 shorter than wide; the subcostal crossvein inserted at the base 

 of this cell ; petiole of the media about as long as the R-M 

 crossvein ; cubitus forks slightly distad of the tip of the sub- 

 costa ; anal vein strong though incomplete. Halteres yellow. 

 Ithaca, New York. 



Female. Differs in having paler antennas ; abdomen with 

 markings paler brown and less extensive. 



5. Sciophila incallida n. sp. 

 Male. Length 31^ to 4 mm. Yellowish. Thorax pale yel- 

 low, mesonotum an infuscated disk with indications of three 

 longitudinal stripes ; abdomen nearly unicolored dusky yellow 

 to brownish ; legs pale yellow ; fore metatarsus 0.9, the wing 3 

 times as long as the fore tibia ; wing venation and hypopygium 

 as in S. novata, the hypopygium differing only in having 22 to 

 24 palmate spines on the dorsal lobe of the forceps. Ithaca, 

 New York. 



6. Sciophila hebes n. sp. 

 Male. Length 4 mm. Subshining brownish black, the 2 

 basal joints of antennae, coxae, trochanters, legs and halteres 

 yellow; tips of trochanters and apices of tarsi dusky. Body 

 hairs yellow, setae of legs black. Intermediate antennal joints 

 about 1.5 times as long as wide. Margin of the dorsal plate of 

 the hypopygium is convex with 4 longer sparsely feathered setae, 

 besides the usual shorter setae; superior forceps are much 

 curved, ends broadened, spoon shaped (113a) and without setae; 



