British Species of the Genus Stenophylax. 233 



form part of section C of the genus Limnephilus. I now dis- 

 tinguish nine well-marked British species. 



Owing to the species being so much alike in general appearance 

 the synonymy has become very perplexing. That given here is, 

 as far as English authors are concerned, based upon a careful 

 examination of Curtis's and Stephens's types. In the other 

 synonyms I have availed myself of the information contained in 

 Dr. Hagen's revision of Pictet's species in the " Siettiner Ento- 

 mologische Zeitung," and of additional information obtained from 

 him during his recent visit. 



Stenophylax, Kolenati, Gen. et Sp. Trichop. pi. 1, p. 62, 9, 

 Hagen ; Phryganea, Auctorum ; Halesus, Stephens; Limne- 

 philus, Curtis, Rambur ; Anabolia, Brauer. 



A. Anterior wings much dilated towards the apex, hind margin 

 parabolic or circular. 



S. Vibex, Curt. (PI. IX. fig. 1.) 



Limnephilus Vibex, Curtis, Phil. Trans. 1834, 125, 30 (nee 

 Step. Brauer.) 



Antennse pale reddish ochreous ; head and thorax reddish- 

 ochreous, the latter slightly darker on the sides ; abdomen 

 entirely ochreous ; legs pale ochreous, tarsi darker ; anterior wings 

 very pale reddish grey, with numerous small pale yellow spots, 

 which are often confluent, anterior margin as far as the ramus 

 discoidalis and inner margin (^area suturalis) pale yellow, unspotted ; 

 a pale spot enclosing the thyridium is scarcely connected with a 

 semilunar spot at the base of the apical cells, these spots vary in 

 size and intensity ; posterior wings semi-hyaline, the apex yel- 

 lowish. 



Upper margin of last abdominal segment straight, very slightly 

 notched in the middle ; appendices superiores somewhat spoon- 

 shaped, concave internally, the apex and anterior margin rounded 

 and slightly curved, the posterior margin with an indistinct tooth, 

 the margins fringed with rather long distant hairs ; appendices 

 inferiores broad at the base, with a slightly projecting point 

 anteriorly, the margins clothed with long hairs ; lower sheaths 

 curved inwards at the tips and slightly approximating. 



Long. Corp. 8 lin. ; exp. alar. 20 lin. 



Appears to be not very common but widely distributed. I 

 have taken it near London, and specimens are in the following 

 collections, Curtis, locality ? : Dale, from Thorne Moor, York- 



