182 MANDIBULATA. TRICHOPTEllA. 



Sp. 1. subnubilus. Niger, alis fuscescentibus nervis piceis, anticis flavescente 

 subnebuhsus, tibiis tarsisque ochraceis. (Long. corp. 2i — Sf lin. ; Exp. Alar. 

 8§— 12 lin.) 



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

 Nomen. 2d 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 juscescentibus, immaculatis, nervis piceis, tibiis 

 tarsisque ochraceo-fuscis. (Long. corp. 2g 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 ; antennse 

 stout and black. 



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

 shire. 



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



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



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

 N. G.(557.) costalis. Steph. Catal. 318. No. 3618. 

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



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



fuscous; tibise and tarsi dirty-ochre. 



Taken in June, near London. 



Genus XVIIL— POTOMARIA, Leach MSS. 



Antennw 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 trvmcated obliquely : 

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



