212 ENTOMOLOGICAL SOCIETY 



Family SERICOSTOMATID^. 

 Helicopsyche annulicornis, n. sp. 



Basal joint of antennae nearly black, beyond pale, annulate with brown, 

 darker toward tip; legs pale, coxae and femora mostly brown. Wings 

 dusky, with golden and black hair; fringe blackish; abdomen brown, 

 blnck at tips. Wings rather elongate, venation as typical of genus, the 

 reinlet from forking of the median running obliquely backward to cubitus. 

 Spurs, 1-2-4. Length 6.5 mm. 



Plummer's Island, Md., 28th August. 



Differs from H. borealis in annulate antennae, longer wings, 

 and larger size. 

 Helicopsyche borealis Hagen. 



Several from Falls Church and Glencarlyn, Va., and Plum 

 mer's Island, Md., July to September. 

 Lepidostoma togatum Hagen. 



Common along the Potomac river from July to September. 

 Notidobia americana Banks. 



One from Falls Church, Va., June. 

 Brachycentrus incanus Hagen. 



Along the Potomac river in early spring March and April. 



Family LEPTOCERID^. 

 Molanna cinerea Hagen. 



Several specimens from Plummer's Island, Md., i6th and 

 20th May (Currie). 

 Mystacides punctata Banks. 



Several from Washington, D. C.,also Plummer's Island, Md., 

 28th August. 

 Leptocerus mentiens Walker. 



Common along the Potomac river, in June and July. 

 Leptocerus maculatus Banks. 



Washington, D. C., at light. 

 Leptocerus transversus Hagen. 



Common in May, June and July. 

 Leptocerus flavus, n. sp. 



Palpi yellow, more brownish toward apex ; head clothed with white hair ; 

 basal joint of antennae yellowish, be\ond black, the basal part of segments 

 snow-white, except those near tip; thorax yellowish, with white hair. 

 Abdomen in female green, in male yellowish; fore wings uniformly 

 clothed with yellow hair, fringe yellow, all veins pale yellowish; hind 

 wings nearly hyaline, with pale gray fringe; legs pale yellowish. 

 Length c ^ 7 mm., 9 6 rn- 



