TRICHOPTERYX. 371 



yellow. Head large, prominent, eyes rather prominent ; 

 tliorax broadest toward base, not much wider at l)ase than 

 at apex, tubercles very minute, scarcely visible, placed 

 irregularly, sides rather broadly bordered, basal margin 

 nearly straight; elytra scarcely longer than head and 

 thorax, sides straight, apices broad, slightly rounded. Not 

 uncommon. T. Clicvrolati, Allib. 



b b. Body oval. 



Convex. Deep black, not shiny ; with short, pale hairs; 

 legs yellow ; under-side pitchy, mouth and coxae lighter, 

 femora brownish. Head rather long ; eyes prominent ; 

 thorax broadest at base, tubercles small, in curved rows, 

 sides nearly straight in front, basal margin nearly straight; 

 elytra longer than head and thorax, sides curved, apices 

 rounded. L. -^ — j^ 1. Common. T. hovina, Mots. 



2m Antennae yellowish. 



u4. A. Elytra deeply asperate. 



Oblong, moderately convex. Head and thorax black, 

 elytra red, scantily covered with short, yellow hairs ; legs 

 yellow ; under-side black, with mouth, coxae and femora 

 pitcliy. Head rather large, long ; eyes small, prominent ; 

 tliorax broadest at base, tubercles small, in curved rows, 

 sides rounded, very slightly bordered, posterior angles 

 slightly produced; elytra slightly longer than head and 

 thorax, sides straight, nearly parallel, apices broad, nearly 

 straight. L. ^ — ^ 1. Eare. T. Guerini, Allib, 



J? 7?. Elytra very feebly asperate. 



Oval, rather broad, somewhat flat. Black ; legs yellow, 

 under-side entirely black. Head rather long, eyes large, 

 prominent ; thorax broadest toward base, tubercles ex- 

 tremely small, in curved rows, sides slightly rounded, 

 posterior angles very slightly i)roduced ; elytra slightly 

 longer than head and thorax, broadest in middle, sides and 

 apices rounded. L. fV 1- Very rare. T. stiff o cat a, Hal. 



II, Head and thorax chestnut-brown. 

 1* Thorax tuberculate. 

 A A. Head long. 

 Nearly oval, somewhat flat. Chestnut-brown, with 

 silvery hairs ; antennae dusky yellow ; legs bright yellow ; 

 imder-side pitcli-l)rown, with mouth and coxae yellow. 



B B 2 



