OF WASHINGTON. 149 



water, and evidently breeds in the manure. Falls Church, 

 Va. ; High Island, Maryland; April to November. 



Psychoda minuta Banks. 



Taken at Falls Church, Va., in April, May, and October. 

 It is sometimes seen flying around the lamp on warm summer 

 nights. 



Psychoda nigra Banks. 



Not uncommon near streams, resting on rocks, under 

 bridges, and under leaves of plants overhanging the water. 

 Falls Church and Glencarlyn, Va., in May, July, and August. 



Psychoda superba Banks. 



On the trunks of large trees in moist and shady places near 

 streams; Washington, D. C, and Falls Church, Va., June and 

 July. 



Psychoda nitida Banks. 



The only specimens seen were taken on the trunks of large 

 trees on Fourteenth Street, Washington, D. C., in August. 



Psychoda signata Banks. 



Also taken on trunks of trees, Washington, D. C., in July. 



Psychoda opposita Banks. 



Taken in June and July in Washington, D. C., on trunks of 

 trees. 



Psychoda quadripunctata, n. sp. 



Head black, some whitish-gray hair above; antennae dark brown, 

 tapering; thorax black, densely clothed with whitish-gray hair above, 

 and jet-black hair behind near the abdomen; the latter black, with 

 mostly black hair, a streak of whitish hair each side toward tip; legs 

 blackish, the tarsal articles white at the tips. Wings with grayish- 

 white hair on basal part along the second vein, and near the anal 

 margin; on the basal part are four tufts of erect jet-black hair, one 

 near costal margin near base, one on anal margin at end of whitish 

 hairs, and two on the discal part of wing just before the middle; costal 

 fringe long, jet-black, interrupted just beyond the middle and just 

 before the tip by patches of snow-white hair, two similar patches in 



