FUNGUS GNATS OF NORTH AMERICA. 63 



black bristles. Abdomen obscure yellow, base of each seg- 

 ment dark brown dorsally, on the posterior segment the color 

 comes to encircle the segment; the short pile is black. Legs 

 light yellow, tarsi becoming tinged with brown ; beside the long 

 apical bristles the middle and hind tibife have each a row of 

 shorter bristles ; anterior tarsi twice as long as their tibise, 

 middle tarsi 1.5 times as long and hind tarsi as long as their 

 respective tibiae. Wings .hyaline ; Rs and anterior branch of 

 media divergent, furcation of media beyond base of Rs. Hal- 

 teres light yellow. "Mayfield Cave, Ind." 



An examination of the type specimen, which was sent to me 

 by Dr. Adams, proves it to be a true Phronia. The costa is but 

 slightly produced beyond the tip of Rs. The hypopygium which 

 is pale yellow, resembles that of P. vcmista in the form of the 

 terminal lobes but differs in having upon the inner side of each 

 lobe near the tip a patch of short stout setse projecting dorsad. 



Female. A specimen from Selkirk Mts. B. C. and one from 

 Wyoming may belong here. They differ in not having the 

 lateral stripes of the mesonotum fused posteriorly. 



25. Gemis Tcliiiaphiliis Becker. 



Mitt. Zool. Mus. Berl. IV. 67. 1908. 

 With the characters of Phronia, differing only in having an 

 elongate attenuated subcosta which ends free beyond the middle 

 of the basal cell R and in having one or two dusky clouds upon 

 the wing. Besides the two species assigned to this genus by 

 Air. Becker it is probable that the European species Phronia 

 forcipula (var. hu'incralis) basalis and nitidiventris also belong 

 here. 



Tabic of species. 



a. Apical wing cloud wide, arising proximad of apex of Ri; Rs 

 strongly bowed. Cal. i. tenehrosa. 



aa. Apical wing cloud narrow, arising at apex of Ri ; Rs not strongly- 

 bowed (Fig. 158). N. H., N. Y. 2. nebulosa n. sp. 



I. TcIiiiaphiliis tenehrosa Coquillett. 

 Proc. Ent. Soc. Wash. VI. 170. 1904 (Phronia'). 

 Female. Length 2.5 mm. Black, the halteres and legs yel- 

 low, the last 2 pairs of cox^e, the hind edge of the front ones, 

 a streak on under side of each femur near the base, the apices 



