648 DERMESTID &. 
3. Trogoderma gravidum, sp. n. 
Ovale, convexum, nigrum, fusco-pubescens, minus variegatum; elytris fasciis duabus tenuibus albido-pubes- 
centibus ; antennis medio testaceo; pedibus rufo-obscuris. 
Long. 2 5 millim. 
Hab. Mexico, Guanajuato, Puebla (Sallé). 
We have only the female sex of this insect. The individuals are larger than those 
of any other Zrogoderma known to me, and have the upper surface less variegate, there 
being no trace of red colour on the elytra, and only two, not very conspicuous, white 
bands on the elytra. The eyes are not emarginate. Joints 3-6 of the antenne small, 
but not minute; seventh joint transverse, but small; joints 8-11 forming a short club, 
darker in colour than the preceding joints. The thorax is strongly transverse, very 
convex, the sides not being at all directed outwards, much narrowed in front, the 
pubescence at the sides white, and also of this colour at the base, except in the middle. 
Elytra with a median arcuate band of scanty white hairs, also with a few white hairs 
between this and the base, and a rather more distinct band before the apex; the 
clothing is chiefly of a tawny colour. The legs are red, but infuscate, the femora 
being nearly black. Four specimens. 
4, Trogoderma mexicanum. 
Trogoderma mexicanum, Reitter, Verh. Ver. Briinn, xix. p. 89 (1881) °. 
Hab. Mexico}. 
I have not seen any specimen corresponding to the description of this species, which 
_is stated to have red antenne. 
EUCNOCERUS, gen. nov. 
Antenne 11-articulate, maris serrata, femine clavate ; clava 4- vel 5-articulata. 
This curious genus is readily distinguished by the Serricorn antenne of the male, 
and by the unusually large number of joints in the club of the female. The prothorax 
is deeply depressed along each side of the under surface for its whole length for the 
reception of the antenne, but the groove in its posterior part is much less definite in the 
female than it isin the male. The prosternum is quite horizontal along the middle, 
with the front margin a little pendent, and the retracted head is closely applied to it, 
leaving only the mandibles free. The middle legs are rather widely separated, and the 
mesosternum bears a deep and definite horizontal groove for the reception of the 
prosternal process. The legs are very slender, the tibiee unarmed externally. 
The genus is allied to Zrogoderma, from which it is distinguished by the form of the 
male antenne, the articulations of which are placed on one side, as in the Serricorn 
Coleoptera, not in the middle as in the Clavicornia. The N.-American Trogoderma 
tarsalis and T. serriger probably belong to Eucnocerus. Although T’rogoderma has long 
been recognized as a composite genus, Hucnocerus seems to be separable from all its 
