FUNGUS GNATS OF NORTH AMERICA. 287 



femora black, spurs and tibiae yellow, tarsi toward their apices 

 subfuscous. Wings yellowish, tinged with- cinereous, along 

 the costa more yellow ; preapical fascia wide, entire, slightly 

 arcuate, fuscous spot at the proximal end of the crossvein and 

 another below Cu2 near its tip. Halteres yellow. "Middle 

 States." 



Male. Similar to female in coloring, but three thoracic 

 stripes are feebly indicated. Hypopygium yellow (Fig. 167). 

 Wing venation as shown (Fig. 201). Both sexes from N. C. 

 (C.U.), Wis. (W.M.W.), Ohio and Ithaca, N. Y. July-Sept. 



Var. a. Female. Differs from the foregoing in having 

 the crossvein longei" than the apical section of Ri, and in hav- 

 ing narrower abdominal fasciae which arc not produced along 

 the middle line. This specimen may represent a distinct species. 

 Longmire's Springs, Mt. Rainier, Wash. (J.M.A.) 



16. Leia concinna Williston. 



Trans. Ent. Soc. London ,259. 1896. (Neoglaphyroptera). 



Female. Length 4 mm. Differs from ohlectabilis as follows : 

 Antennas brown or blackish, the basal joints yellow; bristles 

 and very short hair of the thorax black. ' Leg proportions as 

 far as given by Williston are the same as for ohlectabilis. "St. 

 Vincent Isl., W. L" 



17. Lria dry as n. sp. 

 Male and female. Length 3.5 to 4 mm. Pale yellow; each 

 of the black ocelli surrounded by a narfow black border; an- 

 tennae scarcely as long as the head and thorax, growing fuscous 

 on their apical half. Thoracic dorsum with sparse yellowish 

 hairs among which are scattered a few black ones. There are 

 traces of 3 or 4 longitudinal reddish bands. Scutellum con- 

 colorous with the thoracic dorsum; metathorax and postalar 

 tubercle inclining to fuscous; a small black dot back of the 

 insertion of each wing. Abdomen rather thickly covered with 

 pale yellow hairs ; the posterior fourth or third of each segment 

 fuscous. Genitalia of male pale yellow. (Fig. 168). In the 

 female the apical half of the abdomen, above and below, is 

 fuscous. Legs paler than the thorax and abdomen ; fore tibije 

 less than half the length of the fore tarsi : apices of hind femora 

 black; tarsi fuscous. Halteres pale yellow. Wings yellowish 



