FUNGUS GNATS OF NORTH AMERICA. 97 



length of the tarsi and shorter than the metatarsi; middle 

 tibise with 2 large and one small bristle on the inner side; 

 middle and hind tibiae with spines on the outer side; hind 

 metatarsi distinctly shorter than the remaining joints of the 

 tarsi together. Wings tinged with yellowish; a small brownish 

 cloud on the basal section of the radial sector. "St. Vincent 

 Isl." . 



21. MycefopJiUa bipunctafa Loew. 



Berlin. Ent. Zeitschr. XIII. 152. 1869. 



Female. Length 2.4 mm. Head fuscous, opaque, face and 

 mouth parts pale yellowish ; scape and sometimes base of flagel • 

 lum, yellow ; flagellum blackish. Thorax fuscous black, humeri 

 luteous ; scutellum and abdomen fuscous black, the extreme 

 tip of the latter and the venter, yellow. Coxje and legs pale 

 yellow, tips of hind femora fuscous, tarsi subfuscous ; middle 

 tibiae each with 2 setae on flexor surface; hind metatarsus 

 about ecjual in length to the remaining 4 joints taken together. 

 Wing with a small central spot. "Wis." There are 2 ranges of 

 setas on the extensor surface of the hind tibiae in the type 

 specimen. 



Male and female. The female as above, the male like the 

 female but the middle tibia usually bears a small setae above 

 the larger ones on the flexor surface and the humeri and venter 

 are usually not much paler than the other parts ; hypopygium 

 (Fig. 78). 



Orono, Maine,' Nov. ; Ithaca, N. Y., June-Aug. ; N. J., Wis., 

 Wyo., (W.M.W.), Sept. 



22. Mycctoph'la inciilta Loew. 



Berlin. Ent. Zeitschr. XIII. 153, 1869. 

 Female. Length 3.7 mm. Head brown, face and mouth 

 parts luteous, antennae brownish, scape and the very base of 

 the flagellum luteous. Mesonotum brown, shining, hairs ap- 

 pressed, yellowish; setae black; pleura fuscous; scutellum dark' 

 brown with a median luteous spot. Abdomen fuscous or black- 

 ish, each segment except the first yellow margined, dilated into 

 triangles en the sides ; anal lobes brownish at the base, ochrace- 

 ous apically. Coxae and legs yellowish, tips of hind femora 

 blackish, tarsi subfuscous. hind metatarsus about equal in lengtli 



