512 Mr. T. Vernon WoUaston on the 
differently constnicted. In reality it belongs to that par- 
ticular section of the Pentarthrides in which the scutellum 
is developed and the surface bald, and it is remarkable 
amongst the immediately-allied forms for its somewhat 
convex, Phlceophagus-like body, for its (rather short and 
broad) rostrum being a good deal contracted, or as it were 
pinched-in, at the base, for its eyes being (instead of pro- 
minent) depressed, and for its four anterior legs being (as 
in the Phlceoidiagi) much more approximated at their base. 
Its surface (which is shining) is of a reddish, and slightly 
pellucid, chestnut hue, — with the head, rostrum, and femora 
a little darker than the rest; its antennas are somcAvhat 
thickened, with their second funiculus-joint not at all 
elongate ; and its feet have their first articulation (as in 
Pldceopliagus) appreciably lengthened, and their third one 
minutely (and not very distinctly) bilobed. The example 
from which the generic details have been compiled is 
South- American (having been received from New Gra- 
nada), and has been communicated by Mr. Fry. 
11. PsEUDorENTARTHRUM (nov. gen.). — The rather 
obscure little Cossonid which forms the type of the ]n-cscnt 
genus, is from ]\lexico, and has been communicated by 
Mr. Fry ; and its prima facie aspect is so much that of a 
minute and cylindrical Phhvophagus, that until I observed 
that its funiculus is only 5-jointed I had regarded it as a 
member of that group. In reality however it is very close, 
in affinity, to Pcntartliruni, — from which it neverthelesa 
recedes in its very much smaller size and shortly-cylindri- 
cal body, in its more abbreviated and relatively broader 
(though equally parallel) rostrum, in its prothorax and 
metasternum being very much less elongated, and in its 
anterior coxa) being much more approximate. Indeed 
the latter are almost exactly the same as in Phloaojiliagns, 
the front ])air being nearly contiguous ; and its protliorax 
also, which is oval (instead of elongate and subtriangular), 
is almost on the Phla'ophagiis-i)attevn. Its under-scg- 
ments are slightly scooped-out, or concave, after the 
fasliion which obtains in so many of the Pentarthrides ; 
its sin-face is completely bald, black, and but very slightly 
shining ; and the third articulation of its feet is simple. 
In point of fact, however, the present genus is some- 
what intermediate between Pentarthrum and Phlceopha- 
gomorphus, agi'ecing with the latter in its more approxi- 
mated anterior, coxa? ; nevertheless it entirely wants the 
