268 
DESCEIPTIONS OF NEW GENERA AND SPECIES OF EETEBOMBU. 
BY F. BATES. 
Family TENEBRIONID^. 
Sub-Family TENEBRIONIN^. 
EXEEESTUS, n. g. 
Mentum concave on its outer face, transverse, truncated in front, the sidesa 
httle rounded anteriorly, thence slightly contracted to the base : labmm prominent 
transverse, rounded in front and notched in the n^iddle : last joint of lalial ,ak. 
bnefly securiform: inner lobe of ma.iU^ not (or obsoletely) armed at the tip 
densely clothed with long, setiform hairs : last joint of labial ^alpi broadly secnri: 
form : mandibles notched (at the outer side) at the end : lairum very prominent 
vertical, transverse, the angles rounded, sinaous in front: head very large andver; 
long (overs lines); widest-and much prolonged-behind the eyes, somewhat 
abruptly terminating in a short, thick neck : epistoma strongly decHvous-or bent 
down m front, elongate-trapeziform ; a broad, deep, semi-circular notch in the fore 
margm revealing the membrane attaching it to the labrum ; faintly separated froi. 
the front by an arched impression, which is interrupted in the middle : eyes small 
transverse, very narrow, scarcely notched in front, very distant (IJ lines) from the 
prothoraxj ashght.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, 8ub-obconic; 9-10 shorter ; the terminal joint is wanting 
in the only example I possess of this genus : prothorax scarcely wider than long 
Bomewhat convex ; narrowed in front and behind ; slightly rounded at the sides- 
which are margined and crenulated ; truncated in front-which is faintly mar-^ined 
at each side only ; the fore angles rounded and depressed ; base sub-sinuous, finely 
margined, the angles small but distinct and forming right angles: sactellum 
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 : epiplexiral 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 tibia, slightly curved at the en.d ; the hind a httle 
sinuous; all provided with two short, acute spurs and tomentose within, at the 
extremity: the 1st joint of the posterior tarsi elongate: intercoteal process vathev 
broad, rounded in front : metasternum somewhat short : mesosternum declivons, 
strongly concave in front : prosternal process not prominent, rounded behind: body 
wingless. 
A genus 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 c/ieeis for the sides of the head be?nnd the eyes 
£=sHHrHrw--'5~"--- 
