176 MANDIBULATA. TRICHOPTERA. 



especially at the base, pale ochreous, immaculate, nervures very faint ; ]eg,s 



pale yellow. 



Taken near London, in June. 



Sp. 4. iinicolor. Subgracilis, ochraceus, capiie fialpisque hrunneis, alls hyalinis, 

 perlepide iridescentibus. (Long. corp. 2 lin. ; Exp. Alar. 6 lin.) 



Hyd. unicolor. Pictet, p. 218. jd/. xx.J". 5. 



Rather slender : head and palpi brown, the latter darkest or dusky; rest of 

 the body, with the legs and antennte, bright ochreous ; wings pale ochreous, 

 very transparent, immaculate, and beautifully iridescent. 



Found in June, at Hertford. 



Genus XV.— POLYCENTROPUS, Curtis. 



Antennae stoutisb, shorter than the wings, but longer than the body, the 

 basal joint thickened, the apical ones attenuated : palpi slender, slightly 

 pilose; maxillary long and incurved, the terminal johit somewhat filiform, 

 transversely wrinkled, and about as long as the others united : head trans- 

 verse-ovate : eyes globose: thorax robust: wings small; anterior some- 

 what elliptic-ovate, rounded at the apex, narrowed at the base, the costa 

 with a central transverse nervure, two others in a line towards the tip at 

 the base of the second furcate nervure, an oblique one towards the hinder 

 angle, and another between that and the inner margin towards the base ; 

 posterior slightly folded: legs rather stout, anterior shortest, their tihice 

 furnished with a pair of spurs at the apex, and another on the side above 

 the middle; intermediate and posterior each with a pair at the apex, the 

 former with a second pair above the middle, and the latter with a pair near 

 the apex ; intermediate tibiae at the apex, and their tarsi, dilated in the 

 females. 



This genus — Amathus of my Nomenclature, 2nd edit., (555) of my 

 Catalogue — agrees with Cyrnus and Plectrocnemia in having a spur, 

 or spine, about the middle of the anterior tibiae, as in many Lepi- 

 doptera, in addition to a pair at the apex ; but from these genera 

 the different neuration of the wings, exclusively of the variation 

 in the structure of the palpi, distinguishes the present; the colouring 

 is gayer than in those insects, and the form of the wings dissimilar : 

 the species are of small size, and rather difficult to discriminate from 

 each other. 



Sp. 1. subpunctatus. Fusco-hrunneus, antennis pedibusque ochraceis, alls 

 ochraceo-fuscis, anticis obsolete fusco irroratis. (Long. corp. l\ — 2 lin.; Exp. 

 Alar. 6—7 lin.) 



