200 MALACODERMATA. 
white silky pubescence widens till it covers the apical third of the elytra. Posteriorly, 
near the suture, are two minute tubercles tipped with black hairs; and behind them 
are two not very conspicuous callosities. These four tubercular elevations are traceable 
in the species I regard as 7. imperator; but there are in that species other squamose 
points which are not found here. The legs are blackish, with ashy hairs and silky 
grey pubescence. The antenne, which in 7. imperator are dark, are here rufous. 
Their structure is the same. 
A single specimen has occurred. 
3. Trichodesma W-album. 
Griseo-pubescens, maculis pilosis nigris albisque variegata ; antennis brevibus, ferrugineis, articulis tribus ultimis 
picescentibus ; prothoracis dorso conico-elevato ; elytris quam thorax duplo latioribus, macula,;communi sutu- 
rali nigra, scutello et fascia mediana valde dentata in medium litteram W prebente albis. Long. 32 millim. 
Hab. Guaremaua, Sinanja valley (Champion). 
Head covered with griseous pubescence; eyes prominent, subglobose, not so wide as 
the sides of the thorax; antenne scarcely half as long as the body, rufous, the three 
terminal joints as long as the basal part, apical joint fusiform, longer than the ninth or 
tenth, but shorter than they taken together. Thorax densely covered with ashy and 
slightly variegated scales, its middle strongly conically raised and pilose; its width is 
not much more than half that of the elytra. The elytra are punctate striate ; but their 
surface is but little visible. The white and black markings take the form of longi- 
tudinal streaks; the most conspicuous of the black are a round spot at the central apex 
of the W, and a smaller one at each of its lower angles; there is also a black square 
spot on the suture at the apex, preceded by two white ones. There is but a single 
specimen of this among the species collected by Champion in the Sinanja valley. It is 
of course possible that the white W may not always be so conspicuous as it is in this 
example. 
4. Trichodesma albistolata. (Tab. X. fig. 7.) 
Nigra, pilosa, cinereo-pubescens ; thoracis disco elevato, lateribus et medio, scutello, elytrorum linea humerali 
fere ad apicem producta, punctoque lunulato pone medium communi cinereis; antennis nigro-fuscis, 
articulis tribus ultimis valde elongatis flabellatis. Long. 23 millim. 
Hab. GuateMaLA, Panima, Chacoj (Champion). 
Black, with a faint leaden tinge; thorax elevated into a cone, surmounted with 
black and grey pile, hiding the head, its sides and front and the tip of the cone with 
leaden-grey pubescence, the rest deep black, velvety. The form of the thorax and elytra 
and their punctuation are almost the same as those of the following species, from 
which it chiefly differs in the remarkable development of the three terminal joints of 
the antenne. The first of these is alone as long as the preceding joints taken together ; 
