370 Mr. F. Bates's descriptions 
face is sparsely clothed with rather long, decumbent, cine- 
reous hairs, and the last joint of the antennee is elongate-oval 
and larger and longer than the 1 0th. 
Long. 6^ lin. 
Ilab. — I have received two examples of this species from 
Paris, as coming from New South Wales. 
MISOLAMPIDES. 
Metisopus, n. g. 
Mentum trapezoidal, convex, unicarinate : head deeply 
immersed in prothorax, not — or but little — inclined, tra- 
peziform in front : ejnstoma elongate, completely hiding 
the labrum, the apex feebly emarginate, the angles rounded : 
joint 3 of antenna but little longer than 4, 7 — 10 gradually 
transverse (but much less strongly so than in Isopus^, 11 
large, subovoid : yrotliorax subquadrate, very moderately 
convex, sides subparallel, incurved at apex, rather strongly 
marghied and a little canaliculate A^^thin, apex feebly emar- 
ginate, front angles not produced, narrowly rounded ; base 
rounded in the middle, hind angles somewhat obtuse, nearly 
forming right angles: scutdlum minute, triangular: elytra 
suboval, produced at apex, moderately convex, scarcely 
Avidcr — and subsinuously emarginate — at base than base of 
protliorax, strongly margined at the sides, reflexed, and 
canaliculate within : prosternurn not bulged out from the 
anterior border, a little compressed immediately in front of 
the coxa', the jirocpss horizontal, produced and lanceolate 
behind, longitudinally concave : mesosternum moderately 
Avide, vertical — and broadly, deeply and triangularly emar- 
ginate — in front, base squarely truncated : metasternum 
between the coxas not equalling in length the 2nd ventral 
segment : intercoxal process moderately wide, oval : leffs 
longer than in Is opus ; 1st joint of hind tarsi a little longer 
than the two following united : bodt/ oblong-oval. 
Near Isopus, but at once to be distinguished by the 
form oblong-oval, and much less convex ; the subquadrate 
prothorax feebly emarginate in front, the apical angles not 
prominent; the presence of a scutellum ; the different pro- 
sternum ; the naiTOwer, oval intercoxal process, &c. 
From Pseudhelops it may be known by the longer head 
(especially the epistoma), the concealed labrum ; the more 
strongly expanded and depressed outer joints of the 
antenna; ; the differently formed prothorax — the sides 
