TRICHOPTERYX. 367 



base than at apex, widest near middle, with close, irregular 

 transverse rows of minute tubercles, sides only slightly 

 rounded ; elytra not longer than head and thorax, ieebly, 

 rather diffusely as])erate, sides nearly straight until near 

 apex, thence rounded, apices scarcely rounded. L. j%- 1. 

 Very rare. T. Waterhousci, Mat. 



2. Elytra brown-black. 



A A. Head moderately long ; elytra with .sides 

 nearly parallel. 



Oblong, strongly convex. Black or black-brown, rather 

 closely covered with long, whitish hairs ; legs yellow, eyes 

 prominent ; thorax broadest at base, with moderately large 

 tubercles placed irregularly, sides slightly rounded and 

 feebly bordered ; elytra longer than head and thorax, deeply 

 and closely asperate in nearly straight transverse rows, 

 sides nearly straight until near apex, thence rounded, apices 

 strongly rounded. L. -^ — ^ 1. Somewhat common. 



T. Montandoni, Allib. 



J5 2?. Head short and broad ; elytra slightly nar- 

 rowed toward apex. 



Differing from T. Montnndo7ii in being more elongate, 

 with longer thorax, the tubercles on which are rather small 

 and placed in curved rows. L. -^ — ^ 1. Not uncommon. 



T. rivularis, Allib. 



3, Elytra deep black. 



Oblong, nearly cylindrical. Deep black, very scantily 

 covered with short, silvery hairs ; legs yellow ; antennae 

 sometimes rather pitchy. Head large, very broad, eyes 

 prominent ; thorax broadest toward base, not much narrowed 

 in front, tubercles moderately large, in irregular rows, sides 

 rather broadly bordered ; elytra considerably longer than 

 head and thorax, deeply and closely asperate in remote, 

 transverse, curved rows, sides straight until Ijeliind middle, 

 thence gently rounded, apices not much rounded. L. 

 scarcely -^ 1. Very rare. T. Jansoni, Mat. 



II. Antennae, under-side of mouth and coxae pitch- 

 black. 



1, Head broad and short. 



A A. Scutellum large ; elytra rather strongly 

 asperate in almost sti'aight roAvs. 



