FUNGUS GNATS OF NORTH AMERICA. I45 



parts fuscous ; antennee much longer than the head and thorax, 

 pale yellow, the joints of the scape nearly spherical, fuscous, 

 first flagellar joint over 5 times as long as wide, the following 

 joints gradually decreasing in length. Thorax ochraceous, with 

 5 faintly brown longitudinal stripes, the middle one abbreviated 

 behind, the next pair converging posteriorly, the outer pair 

 abbreviated anteriorly ; upon these lines are arranged hair-like 

 setae, those over the base of the wing and on the scutellum long- 

 est ; pleura, sternum and metanotum brownish, nearly bare. 

 Abdomen brown, posterior markings of the segments yellowish, 

 hairs short, yellow ; the abdomen long, slightly thickened api- 

 cally, hypopygium (fig. 124) small. Coxae and legs long, yel- 

 low, the tibia and tarsi somewhat darker, due mainly to the 

 presence of brownish hairs ; no lateral tibial setae, tarsi sparsely 

 ciliated with very short and fine dark setae; spurs pale yellow, 

 little less than twice as long as diameter of the tibia at the 

 apex ; claws very small, apparently with only a single fine tooth 

 near middle ; empodium brushlike ; fore metatarsus 0.9, the 

 second fore tarsal joint 0.32 as long as the tibia. Wings hya- 

 line, large, broad, longer than the abdomen, with long hair, 

 especially apically, among the usual minute setulae ; veins yel- 

 lowish brown ; costa (fig. 87) ends at the tip of the wing and 

 beyond the tip of R4+5, which is much arched; cell R^ about 5 

 times as long as wide ; subcosta ends about opposite the prox- 

 imal end of the small cell ; the subcostal crossvein is nearly the 

 length of the small cell proximad of the apex of the subcosta; 

 media forks slightly proximad of the apical end of the small 

 cell, and the cubitus forks slightly distad of its base ; anal vein 

 not strong, ends a little distad of the fork of the cubitus. The 

 figure 87 shows the wing slightly foreshortened. Halteres long, 

 infuscated; knob ovate, its base and tip more yellowish. 



One specimen from Old Forge, New York, collected by Pro- 

 fessor Ncedham in August. 



6. Genus Polylepta Winnertz. 

 Polylcpta, Winnertz, Verb. Zool.-bot. Ges. Wien. XIII. 745. 



1863. 



Head small, flattened in front, placed low upon the thorax ; 

 eyes oval, somewhat emarginate at the base of the antennae; 

 ocelli 3 in number, placed in a more or less curved line on the 



