PSALOBRENTHUS. 4] 
PSALOBRENTHUS, gen. nov. 
Mas. Corpus elongatum; rostrum thoracis longitudine, apice dilato; antenne medianew, mediocres; caput 
breve transversum, supra et subtus levissime constrictum, ad latera profunde constrictum, angulis liberis. 
This very anomalous Brenthid appears to be nearest related to Episphales and 
Belophorus. The rostrum is rather broad, with a marked apical dilatation ; the robust, 
if small, mandibles are quite prominent, and enclose an empty space. ‘The head is 
compressed, and is separated from the globular neck above and below by only a very 
slight constriction, but the sides nevertheless form each a free angle projecting back- 
wards. The front femora have a long slender tooth, and the curved tibie bear below 
the middle a long spine; the hind femora have a small sharp tooth. The abdominal 
segments are more elongate than they are in Rhaphirhynchus. 
This genus has much in common with Clwoderes, but differs from it remarkably in 
the structure of the head, which in Clwoderes is lobed on the vertex but not at all on 
the sides, while in Psalobrenthus this part is lobed at the sides, but not at all on the 
vertex. 
Lacordaire placed Cleoderes in his ‘ Brenthides vrais’; this position is, however, even 
in accordance with his own system, clearly erroneous, there being no depression at all 
on the underside to separate the head from the neck: either Clewoderes should form 
with Psalobrenthus a distinct tribe, or be associated with Episphales. I here adopt the 
latter course. 
If we may trust Jekel’s determination, in the British-Museum collection, of Arrhenodes 
perletus, Schénh., that insect is a species of Psalobrenthus. A very curious Brenthid 
in the British-Museum collection, labelled ‘ Oxyscapus, n. gen., Jekel,” is apparently 
very closely allied to Psalobrenthus. The genus Ubanius, just established by Dr. Senna, 
differs in having the vertex in the middle abruptly constricted behind the eyes, whereas 
in Psalobrenthus the middle of the vertex is remarkably flat, and there is no abrupt 
constriction between it and the neck. 
1. Psalobrenthus solitarius, sp.n. (Tab. II. fig. 10.) 
Mas. Elongatus, fusco-niger, capite thoraceque subzenescentibus, politis ; elytris regulariter striato-punctatis, 
lineis flavescentibus ornatis. 
Long. 28 millim. 
Hab. Costa Rica (Sallé). 
Antenne with the five basal joints entirely glabrous and shining, the terminal three 
joints pubescent, ninth and tenth equal, each distinctly longer than the eighth. Rostrum 
just as long as the thorax, prorostrum flat above, metarostrum sulcate. Eyes elongate, 
prominent, but shining and little different from the contiguous polished parts. Thorax 
very elongate, polished, vaguely creased in front. Elytra with very regular series of 
punctures; next the suture with a single impunctate stria. The yellow lines are as 
follows :—second interstice with three lines, one from the base to the middle, and 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 6, July 1895. GG 
