94 Mr. J. O. Westwood’s Descriptions of 
is however quite distinct from these two genera, as well as from 
Paussus, by its general characters ; so that I am compelled to 
establish a new genus for its reception, which I have named in 
allusion to the structure of the thorax which has some resemblance 
to that of Lebia and Masoreus in the narrowness of the posterior 
part, although it will be evident that in this new genus it is the 
anterior lateral angles and not the posterior part of the thorax, as 
in those genera, which are dilated into lobes. I am by no means 
convinced that the terminal part of the antennae which I have de- 
scribed as 5-jointed consists of more than a single joint with 
several constrictions, not having been enabled to macerate or relax 
the insect of which I have seen but two specimens. For the 
like reason I have been unable to examine the structure of the 
internal parts of the mouth. The insect which in my Monograph 
upon this family, I have doubtingly associated with the Platijrho- 
pali, under the name of Pl. apluslrifer , is not improbably a 
second species belonging to this new genus, having the thorax of 
a somewhat similar form ; the antennae are not so apparently arti- 
culated, although if, as I have conjectured, the antennae of the 
type of this new genus be not articulated but merely constricted, 
there will be less reason to doubt the propriety of the association 
of Pl. apluslrifer therewith, especially as traces of constrictions 
are to be noticed upon the clava of its antennae, and as the latter 
organs are similarly provided with spines. 
Species 1 . Lebioderus Gorii, Westw. 
Testaceus, tenuissime punctatus; elytris paullo saturatioribus, an- 
tennarum clava margine postico 4-dentata. 
Long. corp. lin. 3^. 
Habitat in Insula Java. 
In Mus. Dom. Gory et Buquet, Parisiis. 
Testaceus, supra subdepressus, tenuissime punctatus, nitidus. 
Caput porrectum, subtriangulare, antice subemarginatum, 
angulis posticis pone oculos acutis et paullo productis, vertice 
linea impressa notato. Antennae pilosae, clava 4-constrictci et 
quasi 5-annulata, annulo Imo omnium minori, transverso, tribus 
sequentibus latioribus, supra et subtus elevatis, ultimoque ob- 
triangulari, apice rotundato ; annulis 4 ultimis ad marginem 
posticum dente parvo et gracili instructis. Thorax rufo-tes- 
taceus, nitidus, punctatissimus, in medio disci paullo convexus, 
linea impressa centrali. Scutellum parvum, triangulare. Elytra 
rufo-testacea, nitidissima, punctatissima, thorace latiora ; 
