﻿268 [April, 1870. 



DESCRIPTIONS OF NEW GENERA AND SPECIES OP HETEBOMERA. 

 BY F. BATES. 



Family TENEBBIONlD^l. 



Sub-Family TENEBRIONIM1. 



Exebestus, n. g. 



Mentum concave on its outer face, transverse, truncated in front, the sides a 

 little rounded anteriorly, thence slightly contracted to the base : labium prominent, 

 transverse, rounded in front and notched in the middle : last joint of labial palpi 

 briefly securiform : inner lobe of maxillce not (or obsoletely) armed at the tip, 

 densely clothed with long, setiform hairs : last joint of labial palpi broadly securi- 

 form : mandibles notched fat the outer side) at the end : labrum very prominent, 

 vertical, transverse, the angles rounded, sinuous in front : head very large and very 

 long (over 3 lines) ; widest — and much prolonged — behind the eyes, somewhat 

 abruptly terminating in a short, thick neck : epistoma strongly declivous — or bent 

 down in front, elongate-trapeziform ; a broad, deep, semi-circular notch in the fore 

 margin revealing the membrane attaching it to the labrum ; faintly separated from 

 the front by an arched impression, which is interrupted in the middle : eyes small 

 transverse, very narrow, scarcely notched in front, very distant (If lines) from the 

 prothorax ; a slight, angular depression at the posterior corner of each eye, and 

 another, much larger, deeper, and oblong, in front ; these depressions give slightly 

 the appearance of a supra-orbital ridge interrupted in the middle : antennce shorter by 

 one-fourth than the head and prothorax ; depressed ; joint 3 nearly as long as 4 and 5 

 united; 4 — 8 sub-equal, sub-obconic; 9 — 10 shorter; the terminal joint is wanting 

 in the only example I possess of this genus : prothorax scarcely wider than long, 

 somewhat convex ; narrowed in front and behind ; slightly rounded at the sides — 

 which are margined and crenulated ; truncated in front — which is faintly margined 

 at each side only ; the fore angles rounded and depressed ; base sub-sinuous, finely 

 margined, the angles small but distinct and forming right angles : scutellum 

 strongly transverse and convex ; elytra oblong-ovate ; scarcely broader than the 

 prothorax at the base — which is margined and almost squarely truncated ; convex ; 

 gradually declivous behind, the apex sub-acute : epipleural fold entire behind ; 

 mounting to the shoulders, where it forms a prominent angle ; gradually narrowing 

 from base to apex : legs rather long ; femora a little swollen in the middle and 

 compressed ; the four front tibiae slightly curved at the end ; the hind a little 

 sinuous ; all provided with two short, acute spurs and tomentose within, at the 

 extremity : the 1st joint of the posterior tarsi elongate : intercostal process rather 

 broad, rounded in front : metasternum somewhat short : mesosternum declivous, 

 strongly concave in front : prosternal process not prominent, rounded behind : body 

 wingless. 



A genua remarkable by the form and size of its head — the cheeks* 

 being enormously extended in length ; the declivous epistoma (placing 

 the labrum in a vertical position) : the small, narrow eyes — so distant 



* I use the word cheeks for the sides of the head behind the eyes: it is frequently, but most im- 

 properly, u«ed for that projecting portion, in front of the eyes, which partly surrounds the base of the 

 antennae (=antennary orbits).— F. B. 



