286 RHYNCHOPHORA. 
Female. Somewhat elongate, scarcely shining, almost glabrous. Head black, excavate in front, the excavation 
narrowed towards the vertex, the sides of which are convex and deeper over each eye, with three fascie 
of shining fulvous hairs, the lower fasciz arising from the upper anterior border of the eye and curled 
upwards and inwards, the upper fascia arising from the vertex, longer, bipartite, and curled downwards 
and inwards; eyes small, flattened, deeply emarginate. Antenne testaceous, the scape short, very 
strongly dilated and flattened, its superior border more strongly rounded, concave; funiculus 2-jointed, 
the apical joint very inconspicuous; club triangular, much broader than long, truncate at apex, sub- 
concave internally, its upper border curved, its lower border longer, sinuate, the sutures transverse, sinuate, 
ciliate at the apex with long hairs. arising from the apical margin, and with a dense fascicle of hairs 
springing from the inner face of the basal joint and the upper margin. Prothorax oblong, rather 
obtusely rounded at apex, the sides straight from before the middle to the base, the latter subtruncate, 
not margined, the hind angles obtuse ; surface infuscate from the apex to the hinder third, more deeply 
in front, the base and sides testaceous, with no discal elevation, the anterior third obliquely declivous, 
finely asperate, the remainder subimpunctate. Scutellum small, rounded-triangular, black. Elytra 
narrower than the prothorax and one-third longer, subtruncate at base, the shoulders obtusely 
rounded, the sides straight at the base, incurved behind the middle; the apical angles obtusely rounded, 
the terminal emargination shallow; surface cylindrico-convex, dull testaceous-yellow to the middle, the 
sides and posterior half fuscous, becoming blackish apically, scarcely visibly punctured ; declivity obliquely 
retuse, longitudinally impressed, its lateral margins somewhat thickened but scarcely acute, bituberculate. 
Underside testaceous, posteriorly infuscate. Legs testaceous, the anterior tibie slender, their posterior 
face finely asperate, the marginal serrations obsolete. 
Hab. GuateMa.a, Purula in Vera Paz (Champion). 
One specimen. The antenne are unlike those of any other Péterocyclon, and 
resemble those of a female Corthylus, but are relatively smaller, with a two-jointed 
funiculus. The head is like that of P. lobatum, ¢, in structure, though without the 
horn, whereas the remainder of the body is that of a typical Pterocyclon. The mouth- 
parts have not been examined. 
The genus 7rypocranus, Kichh., was proposed for a species agreeing with Ptero- 
eyclon in all points, except in the form of the antenne, head, and mouth-parts. The 
antennal club of 7. cincinnatus, Kichh., is described as subquadrate, with an emarginate 
apex, but the author admits that he did not fully examine the antenna, as he was 
unwilling to relax his unique example. It is therefore difficult to see how he 
investigated the mouth-parts. He describes the maxillary palpi as long, subfiliform, 
and arising from the base of the maxillary lobes. This is very unlike the same 
structures in all other Tomicini. Trypocranus is probably identical with Cosmocorynus, 
and 7’. cincinnatus may find a near ally in the present species. 
TRICOLUS, gen. nov. 
Funiculus antennarum triarticulatus; clava haud magna, ovalis vel orbiculata. Prothorax a basi usque ad 
apicem subconvexus, anterius declivis. Elytra postice oblique excavata, ad apicem emarginata. 
This genus is distinguished from Pterocyclon by a few characters only. The 
funiculus is three- (not two-) jointed, the club ovate or orbicular. The body is less 
elongate and cylindrical, the prothorax being subconvex from the base to the apex, and 
more or less declivous in front. The elytra and limbs show no material difference 
from those of a Pterocyclon. 
