FUNGUS GNATS OF NORTH AMERICA. IO5 



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39. Mycctophila extenta n. sp. ^ , 

 ^lale and female. Length 3.5 mm. Head, antennae, thorax, 

 and abdomen subshining fuscous, the scape, base of flageHum, 

 palpi, humeri, center of scutellum and the hind angles of the 

 mesonotum narrowly dusky yellowish; hairs pale, thoracic setae 

 black; hypopygium (Fig. 92). Coxse and legs yellow, tips of 

 hind femora black, tarsi dusky; fore metatarsus about 7-8 as 

 long as the tibia; middle tibise each with 2 setae on flexor sur- 

 face ; hind tibiae each with 2 ranges of setae on extensor surface ; 

 hind metatarsus nearly .8 as long as the 4 following joints 

 taken together. Wing grayish hyaline, with central spot and a 

 preapical arcuate fascia which extends from the tip of Rs to 

 M=, narrowest in cell Mi (Fig. 210). Halteres yellow. Ithaca, 

 N. Y. April. 



40. Mycetophila n. sp. 

 Female. Length 3.5 mm. Similar to the foregoing, but 

 thorax more shining, the paler parts lighter yellow, no yellow 

 spot on the scutellum, venter yellowish, and fore tarsi more 

 distinctly swollen. N. Y., August. 



41. Mycctophila edcntula n. sp, 

 Male. Length 2.7 mm. Head, antennae, thorax and abdo- 

 men fuscous, the scape, base of flagellum, palpi, small spot on 

 humerus, dusky yellow; hypopygium (Fig. 93). Hairs pale, 

 setae black. Legs and fore coxae yellow, middle and hind coxpfj 

 fuscous outwardly, fore metatarsus less than ,8 as long as the 

 tibia ; middle tibiae each with 2 setae on flexor surface ; hind 

 tibiae each with 2 ranges of setae on extensor surface, hind 

 metatarsus about 1-16 shorter than the following 4 joints taker 

 together. Wing grayish hyaline, with central spot, a preapical 

 fascia which fills apex of cell Ri arising proximad of tip of vein 

 Ri and extends transversely slightly beyond vein Mi ; apex of 

 wing margined with gray (Fig. 211). Halteres yellow. Sel- 

 kirk Mts., Rogers pass, B. C. ! (J.C.B,) July. 



Female, Fore coxae brown, otherwise as above. Hampton, 

 N. H., (S. A. Shaw), Oct. 



42. Mycetophila trichonota Loew. 

 Berlin. Ent. Zeitschr. XHL 155. 1869. 

 Male. Length 2.8 mm. Head fuscous, opaque, face, mouth 

 parts, scape and base of flagellum yellowish, antennae fuscou'. 



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