374 Mr. F. Bates's descriptions 
in common with Clilorocamma, Metisopus and. Pseudhelops 
— a scutellnm. 
Mentum trapeziform, sides in front inflexed, middle por- 
tion prominent, tricarinate, tlie two lateral carina? oblique: 
mandibles bifid at apex : last joint labial j)alpi subcylindric, 
the apex broadly truncated; that of the maxillaries securi- 
form : head inclined, rather deeply immersed in the pro- 
thorax, usually trapezoidal in front ; the epistoma long — 
nearly entirely concealing the labrum — apex broadly but 
not deeply emarginate, the angles sometimes depressed and 
rounded, in which case the head appears broadly rounded 
in front : vertex convex ; epi stomal suture more or less 
distinct : eyes moderate, or rather small, emarginate in 
front, transverse, more prominent laterally than the sides 
of the antennary orbits : antenncn rather short, joint 3 
elongate, 7 — 10 gradually transverse, 1 1 large, rounded at 
apex : protliorax more or less strongly transverse, sides 
finely margined, ordinarily gradually, and slightly curvedly, 
narrowed from base to apex; apex strongly emarginate, 
anterior angles more or less produced, acute, usually 
directed forwards, base feebly sinuous, more prominent at 
the middle than the angles : scutellnm nil : elytra usually 
very convex, the greatest convexity before the middle, 
more or less strongly narrowed behind, the apex produced 
and narrowly rounded ; base slightly sinuate-truncate, and 
slightly broader than base of prothorax, to which it is 
closely applied : epipleural fold broad, more or less 
abruptly terminated before the apex : prosternum bulged 
out in the middle and very convex, comjjressed (the head 
consequently fits rather loosely in the cavity) ; the process 
very broad, robust, horizontal, sti'ongly concave above, 
produced behind, the end broadly triangulate or rounded : 
mesosternum more or less prominent, broad, horizontal, 
vertical in front, and broadly and more or less angularly 
and deeply emarginated for the reception of the prosternal 
process, the base usually strongly arcuate-emarginate : 
metnsternum between the coxa? as long as (sometimes a 
little longer) the 2nd ventral segment : intercoxal process 
very wide, the apex broadly, and somewhat sinuously, 
rounded, or triangulate : leys rather short and robust, 
anterior coxa3 globular, femora thickened in \he. middle, 
compressed; tibins a little arched,- slightly thickened out- 
wardly : 1st joint of hind tarsi as long as the two following 
united, the last long in all : body veiy convex, more or less 
briefly oval, and attenuate at hind extremity. 
