34 RHYNCHOPHORA. 
1. Cacopsalis rudis, sp.n. (Tab. Il. figg. 2, 2; 2a, head and rostrum, ¢.) 
Robustus, convexus, niger, nitidus; elytris flavo-signatis, profunde striatis. 
Long. 17-21 millim. 
Hab. Mexico, Toxpam (Sallé); Honpuras (Mus. Brit.). 
Vertex punctate-strigose, more coarsely in the female than in the male. Meta- 
rostrum sulcate: in the female the groove stops at the pterygia, and the prorostrum is 
almost cylindrical, rather thick, closely punctulate; in the male the prorostrum is flat 
above and granulate, the groove is continued forwards, and in front of the pterygia its 
sides diverge so as to form a sort of raised margin very near to each side of the 
rostrum. ‘Thorax broad, much narrowed in front, without a median groove, impunctate ; 
in the male shining, in the female duller and with the anterior part somewhat uneven. 
Elytra deeply and regularly striate, and with conspicuous yellow marks distributed as 
follows :—an elongate one on the third interstice near the apex ; a series of dots forming 
a transverse band behind the middle, one dot or short mark being placed on each of 
the second to seventh interstices ; a short mark on the third interstice at the base, and 
a similar one just about the middle; on the fourth interstice an elongate mark 
extending from the base to near the middle, on the fifth interstice a dot at the base, on 
the eighth a dot before the middle. Under surface shining, almost impunctate; male 
with a feeble depression on the metasternum and abdomen, and on the pygidium at 
the apex a large very deep fovea. 
Three specimens. 
There are, 1 believe, two males of this species in the British Museum collection 
under the name of “ Arrhenodes poiitus, Jekel MS.” One of them is labelled 
‘“‘ Ffonduras,” the other * Cayenne.” ‘This latter ticket does not appear to be very 
trustworthy. 
HEMIPSALIS, gen. nov. 
Rostrum in utroque sexu parum dissimile, breve ; caput breve, posterius leviter constrictum, collo lato, capite 
latiore. Abdomen segmentis basalibus parum elongatis. 
Although very similar in the structure of the rostrum and mandibles to Cacopsalis, 
this genus differs by the shorter head, faintly, though distinctly, constricted at a short 
distance behind the eyes, and by the fovea on the underside of the head being placed 
in direct connection with the transverse constriction. This genus may therefore be 
assigned to a position near Hupsalis, from which Hemipsalis differs in both sexes by the 
form of the mandibles; in the male sex by the narrower rostrum, and in the female by 
the antenne inserted farther from the base of the rostrum. Except as regards the 
fovea on the underside of the head and the mandibles, Hemipsalis connects Cacopsalis 
with Lupsalis. 
When the two sexes are compared, it is seen that there really exist well-marked 
differences between them as regards the form of the prorostrum and the insertion of 
