TRACHELIZUS. 21 
We have received only two females of this species. It has quite the facies of Hephe- 
bocerus, but the antenne are of the ordinary Trachelizus-type. This latter character 
distinguishes the species from 7. advena, to which it is otherwise in appearance 
extremely similar. On the under surface of the head a series of coarse punctures 
extends from the back as far forwards on each side as the pterygia; on the meta- 
sternum there is a minute round fovea in the middle close to the hinder edge; the apices 
of the elytra are narrowly explanate. On the upper surface the eyes are convex and 
large ; the interocular space is formed as in Hephebocerus mexicanus, that is to say, it 
is subcarinate in the middle, but has no angular depression on the vertex. The 
constriction of the thorax near the front is very vague; there is no thoracic channel. 
The elytra are very highly polished, but distant series of very fine punctures can be 
distinctly seen. 
The species might be described as a Hephebocerus bearing the antenne of a 
Stercodermus. 
3. Trachelizus dispar, sp.n. (Tab. L figg. 20, 3; 20 a, under surface of head 
and rostrum; 20, profile of ditto.) 
Rufus, nitidus, politus; elytris pone medium nigro-maculatis ; capite subtus ad basin utrinque foveis duabus, 
ab intervallo nitido separatis, supra utrinque fovea ad marginem anteriorem oculi sita. 
Long. 4-10 millim. 
Hab. Panama, Volcan de Chiriqui (Champion). 
This species is readily enough distinguished from its allies, which on superficial 
examination resemble it extremely, by the pubescent or glandular fovez close to the 
eye: on the under surface there are four of these, two on each side, viz. a round one 
placed just in front of the constriction separating the head from the neck, the second 
one being elongate and placed in front of the other, from which it is separated by a 
very distinct convex interstice ; besides these inferior fovese, there are two other fovee 
on each side touching the margin of the eye, the upper of them being quite visible 
at the side of the upper surface. 
The male is distinguished from the female by the structure of the anterior part of 
the rostrum, and by the abdomen being faintly impressed at the base, and furnished 
round the depression with a few erect setze, its apical segment possessing a smooth space 
along the middle and some closely placed yellow sete at the sides, the hind margin 
very densely punctate. ‘Ihe inner of the two small spurs seen at the apex of the hind 
tibia of the female is replaced in the male by a large mucro directed inwards. 
The series procured amounts to about thirty individuals, the females being in the 
proportion of about three to two. 
