FUNGUS GNATS OF NORTH AMERICA. 179 



An examination of the type shows that the posterior segments 

 have 3 spots each, the middle spot becoming obsolete on the 

 anterior segments. 



Female. Length 5.5 mm. Head and face reddish yellow ; 

 scape and basal flagellar joints yellow, remaining joints more 

 or less fuscous; basal flagellar joints over twice as long as wide ; 

 ocellar spot and setae of the head black. Thorax yellow, 3 pale 

 reddish brown dorsal stripes, the middle one divided ; metano- 

 tum and lower part of pleura with brownish tinge. Setae in- 

 cluding the 4 of the scutellum, black, finer hairs pale. Abdo- 

 men yellow, each tergite with a large, black triangular 

 spot on each side and an elongate median spot extend- 

 ing from the anterior nearly to the posterior margin thus form- 

 ing a nearly continuous longitudinal stripe. Legs yellow, mid- 

 dle and hind coxae with a large spot near the tip on outer side; 

 tarsi infuscated ; fore metatarsus about 0.85 as long as its 

 tibia, sets of the hind tibia less than twice as long as the diam- 

 eter of the member. Wings hyaline, slightly cinereous, heavy 

 veins yellowish brown ; subcosta ends in the costa before the 

 distal end of the cell R^ which is about twice as long as wide; 

 the subcostal crossvein is placed near the middle of this cell; 

 R^^5 ends at the tip of the wing; the petiole of the media is 

 about ^ as long as ]\L ; the cubitus forks under or very slightly 

 distad of the R-M crossvein ; the wing is 5 mm. long, which is 

 3.3 times as long as the fore metatarsus. Halteres yellow. Two 

 specimens from the Selkirk Mts., B. C, collected by Mr. J. C. 

 Bradley in July. 



14. Mycomya maxima n. sp. 

 Male. Length 6.5 mm. Head brown, occiput paler, face, 

 palpi, scape, and base of first flagellar joint yellow ; flagellum 

 dark brown, intermediate joints about twice as long as wide; 

 the two ocelli prominent ; setae black. Thorax yellowy three 

 stripes on mesonotum dark brown, the middle one produced 

 cephalad, the laterals abbreviated anteriorly but all three co- 

 alescent posteriorly ; metanotum and two small spots over base 

 of wing also brown ; scutellum paler brown ; setae black, inter- 

 mingled with very fine pale hairs ; four black scutellar setae. 

 Abdomen yellow, each tergite with a dark brown or blackish 

 spot extending from the anterior margin nearly to the posterior 

 margin, widest at the middle ; dorsum of the sixth and seventh 



