I 



FUNGUS GNATS 01^ NORTH AMliRICA. lOI 



29. Mycetophila fallax. Loew. 



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



Alale. Length 3 mm. Fuscous black, subopaque, humeri, 

 scutellum except the angles and the hind margin of . each ab- 

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

 tibise each with 3 setse on the flexor surface. Wing with a cen- 

 tral spot, 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. trichonota, and Ri ends nearer the apex of the wing. 

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

 on the extensor surface in the type specimen. 



V^^ar. a. Female. Length 3.7 mm. Thorax dark brown, 

 humeral spot large; middle tibias each with 4 setie; preapical 

 wing fascia followed by a pale brown spot on each of Mi and 

 ]\L, thus making an interrupted fascia extending beyond 

 M2. This specimen may represent a distinct species. Stanford 

 LTniv., Cal., March. 



30. Mycetophila pectita n. sp. 



Male. 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 

 scutellum, posterior parts of pleura and the metanotum brown, 

 hairs pale, setae dark. Abdomen dark brown, hypopygium. 

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

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

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

 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 i\Its., B. C. ! 

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



31. Mycetophila lassata n. sp. 

 Male. 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 wing (Fig. 

 204) ; and in the form of the hypopygium (Fig. 85). Felton, 

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



