FUNGUS GNATS OF NORTH AMERICA. I4I 



low, setae of the legs black. Intermediate antennal joints about 

 1.5 times as long as wide. Hypopygium resembles that of S. 

 novata but the dorsal plate differs in having a convex margin 

 with 8 to 10 long, curved, finely but sparsely pubescent setae 

 and in having the dorsal process of the inferior forceps much 

 more strongly developed (fig. 116). Fore tibia has i or 2 small 

 setae outwardly, and 3 or 4 on flexor surface; middle tibia with 

 3 or 4 on inner and i on outer extensor surface, and 3 or 4 on 

 outer flexor surface ; hind tibia with 6 or 8 on inner and outer 

 extensor surface ; empodium brush-like, each claw with a single 

 tooth ; fore metatarsus is about 1-6 shorter than the tibia, the 

 second tarsal joint about half as long. Wings hyaline, yellow- 

 ish tinged, veins yellowish brown ; the subcostal crossvein placed 

 at or slightly before middle of the small cell R^ which is about 

 a?, long as broad, the distance from the humeral crossvein to the 

 subcostal crossvein is twice as great as from the latter to the 

 tip of the subcosta ; the cubitus forks slightly distad of the tip 

 of the subcosta; anal vein strong but incomplete. Length of 

 wing is 3 mm., w^hich is over 3 times as long as the fore tibia. 



Female. Like the male but the ratio of wing to tibia slightly 

 greater. Specimens taken in September at Jackson Lake, Wyo- 

 ming, by Prof. W. M. Wheeler. 



A male from Black Rock Creek, Wyoming, (Wheeler) and 

 a female from Friday Harbor, Washington, (Aldrich) have the 

 subcostal crossvein at the base of the small cell, and by trans- 

 mitted light the abdomen has a yellowish tinge, otherwise as 

 above. 



9. SciopJiila scrcra n. sp. 

 Male. Length 3.5 mm. In coloring like S. hchcs but with 

 rather more brownish thorax. Intermediate antennal joints 

 about 1.5 times as long as broad. Dorsal plate of the hypo- 

 pygium with slightly emarginate border but no plumose setae; 

 superior forceps somewhat curved with acute ajx-.x, only slightly 

 projecting beyond the margin of the dorsal plate; inferior for- 

 ceps (shown in fig. 112 with the dorsal lobe folded out) with 

 25 to 30 palmate spines on the dorsal lobe of which 4 or 5 are 

 separated from the others; 2 slender dorsal spines (s), the 

 stout spine on the ventral surface of the forceps of S. hcbcs is 

 wanting in this species. Setce of the legs as in S. hchcs; fore 

 metatarsus nearly a tenth shorter, the second tarsal joint slightly 



