356 SUPPLEMENT. 
This is a species resembling X. bostrichoides, but remarkable for the armature of the 
head and thorax, the front margins of which in the male are each elevated into a recurved 
and concave lamina. The antenne are distinctly ten-jointed, the third joint elongate, | 
the intermediate joints short; the base yellow, the club black. The punctuation of 
the thorax is so fine that under a “ Coddington” it is only just visible, but under the 
microscope it breaks up into distinct scattered points, between each of which there is 
room for several others of the same size; that of the elytra is thicker and more 
irregular, there being larger and smaller points interspersed. The elytra are only a 
little longer than the thorax, and are very retuse at their apex. 
It is, as usual in this family, the sexual characters, and especially those of the male, 
that afford the best specific diagnostics. In the male the thorax is suddenly depressed 
in front, and then the margin rises as a broad recurved plate, of which the top is 
truncate, with its corners produced a little: it thus forms a sort of cup. The head has 
its front elevated, especially on each side, the “cup” so formed is very shining inside, 
and seems to have a small tubercle in the middle; but there being only one male 
specimen, I cannot examine the head sufficiently to see the whole of the structure. 
MALACOCIS (to follow the genus Xylographus). 
Corpus breve oblongo-subquadratum, dense pubescens. Caput parvum, antenne novem-articulate. Prothorax 
corporis latitudine, convexus, haud cucullatus; prosternum breve, coxas anticas haud superans. 
1. Malacocis championi. 
Brevis, nigro-brunneus, rufo-villosus, breviter pilosus; antennis pedibusque fuscis, illis basi testaceis. 
Long. 17 millim. 
Hab. GUATEMALA, near the city (Champion). 
A little, broad, convex species, densely clothed with coppery-red upright velvety pile. 
The punctuation of the elytra appears very close and subrugose, not in series, nor is 
there any appearance of strie; the underside is of the same fusco-piceous colour as the 
rest of the body, but the mentum is yellow, and the legs are lighter in colour than the 
body; the thighs are moderately compressed, not much widened; the tibize simple, not 
denticulate externally, but not well observed in the specimens before me; the tarsi 
short. ‘The antenne are nine-jointed; the third joint is long and equal in length to 
the three following ones, which compose the funiculus ; the three club-joints short and 
laxly articulated. The head is small, rufous above; the eyes small and not very 
prominent. 
Two specimens of this curious little species are all Mr. Champion appears to have 
obtained. 
