182 MANDIBULATA. TRICHOPTERA. 



Sp. 1. subnubilus. Niger, alls fuscescentibus nervis pideis, anticis jftavescente 

 suhnebulosus, tibiis tarsisque ochraceis. (Long. corp. 2^ — S^ Hn. ; Exp. Alar. 

 8§— 12 lin.) 



N. G. (557.) nubilus. Steph. Catal 318. No. 3616.— Meroe nubila. Steph. 

 Nomen. 2c? edit. col. 119. — Br. subnubilus. Phil. Mag. (Curtis) v. iv. p. 215. 



Black: head and thorax clothed with griseous hairs; wings pale fuscous, 

 anterior with a slight tawny hue, the nervures pitchy, the areolets on the 

 hinder margin, the small discoidal one, and the stigma yellowish in the 

 middle, the inner margin and the edges of the transverse nervures dark 

 fuscous ; posterior wings paler, immaculate, with the nervures dull pitchy ; 

 femora dusky, tibiae and tarsi pale ochreous ; antennae black. 



Taken in the New Forest and in Devonshire, and occasionally 

 near London in June. 



Sp. 2. concolor. Ater, alis fuscescentibus, immaculatis, nervis piceis, tibiis 

 tarsisque ochraceo-fuscis. (Long. corp. 2| lin. ; Exp. Alar. 8 lin.) 



N. G. (557.) concolor. Steph. Catal. 318. No. 3617. 



Deep black: head and thorax clothed with blackish pile; wings pale fuscous, 

 with darker or pitchy nervures ; anterior immaculate, posterior more trans- 

 parent and paler ; femora blackish, tibiae and tarsi dusky-ochre ; antennae 

 stout and black. 



Also found, occasionally, near London, in June, and in Devon- 

 shire. 



Sp. 3. costalis. Ater, alis fuscescentibus, immaculatis, costa stigmateque fuscis, 

 nervis piceis, femoribus fuscis, tibiis tarsisque fusco-ochrace is. (Long. corp. 

 2^ lin. ; Exp. Alar. 8 lin.) 



N. G. (557.) costalis. Steph. Catal. 318. N^o. 3618. 



Deep black : head and thorax clothed with blackish hairs : wings pale fuscous, 

 anterior immaculate, the nervures pitchy, costa and stigma fuscous; femora 

 fuscous ; tibiae and tarsi dirty-ochre. 



Taken in June, near London. 



Genus XVIIL— POTOMARIA, Leach MSS. 



Antenna; shorter than the wings, moderately stout, the basal joint robust and 

 slightly pilose : maxillary palpi clavate in the males, very short ; elongate, 

 slender and pilose in the females, with the terminal joint short and attenuated : 

 head small, pilose : eyes large, globose : thorax stout : wings narrow, anterior 

 narrowed at the base, rounded at the apex, with a few transverse nervures 

 towards the hinder margin, which is somewhat obtusely truncated obliquely : 

 posterior wings small, ovate-triangular, slightly folded within: abdomen 



