THE MYCETOPHILID.?; OF NORTH AMERICA. 255 



8. Platyura mimula n. sp. 



Male. Length 2 mm. Head fuscous, scape of antenna and 

 mouth parts yellowish; flagellum of antennae dusky yellow. 

 Thorax dusky yellow, humeri and lateral margin of mesonotum 

 somewhat paler, metanotum brownish. First four abdominal 

 segments dusky yellow, posterior margin slightly paler ; remain- 

 ing segments as well as the hypopygium dark brown, subopaque., 

 Hypopygium about as wide as the last visible abdominal seg- 

 ment, the superior forceps subtriangular. Legs yellow, tarsi 

 slightly darker, spurs black ; fore metatarsus half as long as its 

 tibia. Wings hyaline, veins dusky yellow ; the subcosta ends 

 in the costa before the base of the radial sector; the subcostal 

 crossvein indistinct, R2-I-3 oblique, coalesced part of the media 

 about two-thirds as long as the petiole, anal vein apparently 

 reaches the margin. Halteres yellowish. From Polk Co., 

 Wisconsin. 



Two females from Hampton, N. H., collected in June by 

 Mr. S. A. Shaw are marked as follows : The head, thorax and 

 abdomen dark brown, subshining; the palpi, scape of antennae, 

 pleura, sterum, venter and narrow posterior margin of the 

 abdominal segments more yellowish ; wings more cinerous ; 

 anal vein does not reach the margin ; in other respects, vena- 

 tion and leg measurements as in the male. 



9. Platyura niclasoina Loew. 



1869. mclasoma Loew, Berl. Ent. Zeitschr. XHL 135. 



Female. Length 6 mm. Black. Anterior and lateral mar- 

 gins of the mesothorax and margin of the scutcllum, yellowish; 

 the scutcllum itself fuscous black. Abdomen black and with 

 black pile, the first segment more fuscous. Legs and cox<'e pale, 

 tibia; dusky yellow, tarsi blackish. \\'ings subhyaline, tinged 

 with dusky yellow, darker on the costal margin ; subcostal vein 

 ends in the costa opposite the base of the radial sector, the sub- 

 costal crossvein wanting; the rather long and oblique R^-f^ 

 ends in the costa not far distad from the tip of Ri. Length of 

 wing 5 mm. Halteres yellow. Recorded from D. C. 



To this description T may add that the preapical wing cloud 

 is short but distinct; the coalesced part of the media is equal or 



