FUNGUS GNATS OF NORTH AMERICA. I77 



each with about twelve stout setse, and a median pair of slender 

 palmate lobes each with six fingers which decrease in length 

 outwardly. Legs yellow, slender ; fore metatarsus about 0.8 as 

 long as its tibia; setae of hind tibia but little longer than the 

 diameter of this member. Wings (fig. 104) hyaline, slightly 

 smoky tinged, larger veins dusky yellow ; subcosta ends in the 

 costa before the middle of this cell ; R^^-^ ends slightly before the 

 tip of the wing; petiole of the media about half as long as M^ ; 

 the cubitus forks proximad of the R-M crossvein. Length of 

 wing is 3.5 mm., which is three times as long as the fore meta- 

 tarsus. Halteres yellow. N. Y., Wis., Ill, ]\Iay, July, August. 

 The species \yas originally recorded from British Columbia. 



« II. Myconiya marginalis n. sp. 



Male. Length 4.5 mm. Resembles M. maxima but differs 

 in size and structure of the hypopygium. Head brown ; face, 

 palpi and base of antennae yellow. Thorax yellow, the three 

 Vkdde stripes on mesonotum, lower margin of pleura, dark 

 brown ; scutellum yellowish brown ; four scutellar setae and setae 

 of mesonotum black ; the finer hairs paler. Abdomen yellow ; 

 tcrgites each with a wide blackish longitudinal stripe, last seg- 

 ment wholly dark, hairs brownish. Hypopygium (fig. 135) 

 somewhat resembles that of M. maxima but here the central 

 "processus" is but feebly developed. Legs slender dusky yel- 

 low, fore metatarsus and tibia subequal, middle coxae spurred ; 

 setae of hind tibiae about twice as long as the diameter of the 

 member, hind coxae brown on outer side. Wings like those of 

 M. maxima but the subcosta ends in the costa a little proximad 

 of the distal end of small cell. Length of wing is 4.5 mm., 

 which is 2.5 times as long as the fore metatarsus. Halteres 

 yellow. One specimen taken in July in the Selkirk Mts., B. C, 

 by Mr. J. C. Bradley. 



12 Mycoinya imitans n. sp. 

 Male. Length 4 mm. Head and antennae brownish ; the 

 basal joints of the latter, face, palpi, and in large part the occi- 

 put, yellow ; ocellar spot black and sharply defined ; intermediate 

 antennal joints somewhat longer than wide, setae of the head 

 black. Thorax yellow, three dark brown dorsal stripes, the 

 laterals converging but not meeting, nor quite reaching scutel- 

 lum, abbreviated anteriorly; the geminate median stripe abbre- 



