26 RHYNCHOPHORA. 
of the cross there is on each side a fine channel formed by a few coalescent punctures, 
filled with white velvet-like matter; this channel only extends as far as the base of the 
pterygia. Prosternum in front of the coxa with a deep large fovea, behind the coxa 
with a few stiff erect setee. Metasternum sulcate in each sex; male with a moderately 
large impression at the base of the abdomen. Apical ventral segment very coarsely 
punctate, similar in the two sexes; tips of the elytral margins quite simple. 
Seventeen specimens. 
12. Trachelizus nigricornis, sp. n. 
Politus, niger, supra corpore medio longitudinaliter rufescente ; prothorace crebrius subtiliusque punctato, 
lateribus parce setigeris ; elytris rufis, nigro-vittatis, externe seriebus punctorum distinctorum, seriebus 
internis obsoletis. 
Long. 10-11 millim. 
Had. Guatemata, Zapote, Volcan de Atitlan 2500 to 3000 feet, Cerro Zunil 
(Champion). 
The surface is very polished, black, with the back of the head and the thorax 
towards the front vaguely rufescent; the elytra with a broad rufescent stripe adjacent 
to the black suture. Vertex with a very deep elongate fovea, not open behind. 
Thorax shining, very finely punctulate, the punctures more distinct in front, and 
the sides in front with a few outstanding sete; the median groove very broad, and 
extending close to the front margin. LElytra with the suture black, and a broad 
black stripe extending from the shoulder to the subapical callosity; near the suture 
the series of punctures are obsolete, but on the outer parts they are quite distinct. 
On the under surface a series of numerous punctures extends from the base of the head 
to anterior to the pterygia, and is very beautifully developed and regular in the female ; 
the carina separating the two series becomes broad on the head, and is there opaque. 
The metasternum is only feebly impressed, the abdomen not impressed in either sex ; 
each apical margin of the elytra is very slightly incrassate. 
One male and two females. 
Several of the following species are similar in colour and appearance to 7. nigri- 
cornis, but it is the only one of this set that has outstanding sete on the sides of the 
prothorax. 
13. Trachelizus robustus, sp. n. 
Politus, rufo-niger; elytris vage rufis, nigro-vittatis, fere impunctatis. 
Long. 14-16 millim. 
Hab. Brivish Honpuras, Belize (Blancaneaux); Nicaragua, Chontales (Belt) ; 
Panama, David (Champion). 
This species is distinguished amongst its allies by the very obsolete punctuation of 
the elytra. The male is peculiar, inasmuch as it has, on each side of the highly 
