FUNGUS GNATS OP NORTH AMERICA. lOI 



./ 



29. Mycetophila fallax. Loew. 



Berl. Ent. Zeitschr. XIII. 156. 1869. 



]vlale. Length 3 mm. Fuscous black, subopaque, humeri, 

 scuteUum except the angles and the hind margin of each ab- 

 dominal segment pale ; thoracic hairs pale, setae black. Middle 

 tibiffi each with 3 setoe on the flexor surface. W^ing with a cen- 

 tral sj)ot, and a preapical arcuate fascia which extends from 

 the tip of cell Ri to vein Mi, the spots being larger and darker 

 than in M. tricJwiiota, and Ri ends nearer the apex of the wing. 

 "Middle States." The hind tibiae each have 2 ranges of setae 

 on the extensor surface in the type specimen. 



Var. a. Female. Length 3.7 mm. Thorax dark brow;;, 

 humeral spot large; middle tibia; each with 4 setae; preapical 

 wing fascia followed by a pale brown spot on each of ]\Ii and 

 ^1-2, thus making an interrupted fascia extending beyond 

 M2. This specimen may represent a distinct species. Stanford 

 L'niv., Cal., March. 



30. Mycetophila pectita n. sp. 

 ^lale. Length 3.5 mm. Head and antennae brown, scape, 

 base of flagellum and palpi yellow. Thorax subopaque dusky 

 yellow, the 3 subconfluent stripes of mesonotum, sides of 

 scutelhmi, posterior parts of pleura and the metanotum brown, 

 hairs pale, setae dark. Abdomen dark brown, hypopygium 

 (Fig. 84). Coxje and legs yellow, tips of hind femora and 

 tarsi brown ; fore metatarsus about .85 as long as the tibia, 

 middle tibiee each with 3 setae on flexor surface, hind tibiae 

 each with 2 ranges on extensor surface. Wing yellowish hya- 

 line, with central spot, and oblique preapical fascia distinct to 

 the middle of cell Rs beyond which it is very faint apparently 

 reaching M2 (Fig. 203). Halteres yellow. Selkirk Mts., B. C. ! 

 (J.C.B.) and Friday Harbor, Wash. (J.M.A.). 



31. Mycetophila lassata n. sp. 

 Alale. Length 3.5 mm. Similar to M. pectita in coloring and 

 structure, but differs in having the preapical wing cloud pro- 

 duced covering the posterior apical margin of the wdng (Fig. 

 204) ; and in the form of the hypopygium CFig. 85). Felton. 

 Cal. (J.C.B.) May. 



