548 Mr. T. Vernon "Wollaston on the 
is a native of jSIadagascar, and has been communicated by 
INIr. Pascoe. It is rather larger in size than the other 
members of the immediate department into which I have 
admitted it ; nevertheless it agrees with them in its surface 
being dark, closely sculptured, and opake, and more or less 
besmeared with dirty, mud-like scales. In other respects 
it is remarkable for its rostrum being broad and depressed, 
channeled down the middle, and with the eyes exceedingly 
prominent ; for its prothorax being appreciably naiTOwer 
than the elytra, a good deal rounded at the sides, and very 
deeply constricted behind the apex ; for its elytra (which, 
when viewed beneath the microscope, are most minutely 
and very sparingly pubescent) having their somewhat large 
j)unctures arranged in longitudinal rows, but scarcely in 
stri.B ; and for its antenna? and legs being much thickened, 
— the former moi'cover having their funiculus-joints very 
closely pressed together, or compact, and their club narrow 
and not at all abrupt. 
^^. PsiLOSOMUS {nov. g€n.\ — The present genus is 
remarkable amongst the Cossonidce for the dark and opake 
(yet bald and densely punctured) surface of the somewhat 
(7aZcmr/r«-shaped insect for the reception of Avhich it is 
proposed, and which has been communicated to me — l)y 
Mr. Janson as a native of Ceylon, and by jNIr. G. Lewis, 
who captured it at Paulo Penang, in the Malay peninsula. 
And it is further distinguished by the comparative large- 
ness of its prothorax, by its widely-sulcated elytra,. and by 
its first abdominal segment (which is more conspicuously 
separated from the second one than is usual in this family) 
having in the male sex a deep rounded dejircssion in the 
centre Avhich is curiously filled up with fidvescent pile. 
Its rostrum is rather short, broad, and subparallel, though 
a little longer in the males than in the females, with 
the antenna; inserted at about the middle point ; and its 
legs (Avhich are robust and a good deal thickened, especially 
as regards their anterior femora) have their tarsi consider- 
ably devclo]ied, — with the ultimate joint elongate, and 
furnished with ])owerful claws. 
I have little doubt that the affinities of Psllosomus are 
Avith such forms as Coprodema and Exodema, from Japan, 
— in which the elytra are costate, and the body (although 
very much smaller) is equally opake and densely sculptured. 
!Xeverthelcss in both of those groups the surface, instead 
