various Central American Coleoptera. 137 
a large oblong fascicle on the suture of the elytra before the middle 
and a small one on the dorsal hump of the thorax. Antennae 
moderately long, comparatively slender, joints 1 and 2 of the club 
subequal in length, elongate-triangular, the apical joint longer and 
more slender than the preceding one. Thorax convex, moderately 
dilated anteriorly, the sides sinuate before the distinct hind angles, 
the anterior angles sharply produced; densely, finely granulato- 
punctate, the dorsal crest abrupt and very prominent. Elytra 
convex, much wider than the thorax, oblong-quadrate, conjointly 
rounded at the apex; with regular rows of closely-placed, coarse, 
transverse punctures, the interstices sparsely granulate. 
Length 3, breadth 1} mm. (? 9.) 
Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith). 
Two examples. Broader than 7. albistolata, Gorh., 
from Vera Paz, the sharply-defined cinereous markings 
very differently arranged, the antennae ferruginous, 
shorter, and with a comparatively slender club. The 
angulate W-shaped median fascia of the elytra is suggestive 
of T. w-album, Gorh., but the two insects are not otherwise 
very nearly related. 
*Trichodesma mexicana. 
Trichodesma mewicana, Pic, L’Echange, xvii, p. 93 (1901). 
Elongate, nigro-piceous, the antennae fusco-ferruginous; varie- 
gated with a thick clothing of whitish, grey, and fulvous, decumbent 
pubescence, intermixed with scattered very long, erect, pallid hairs 
and black and fulvous setae, the whitish pubescence predominating 
on the thorax and on the base of the elytra, and on the latter con- 
densed into a large oblique patch at the middle of the sides, a common 
A-Shaped mark at the middle of the suture, and several curved 
transverse lines near the apex, the fulvous setae clustered into a 
single fascicle on the dorsal hump of the thorax, several others on 
the basal third of the elytra, and some larger ones at about one- 
fourth from the apex, the black setae condensed into several small 
fascicles on the anterior declivity of the thorax and various larger 
ones on the elytra, one on the disc before the middle, one near the 
suture below the base, and one on the outer part of the disc towards 
the apex being more prominent than the rest. Thorax broadly 
arcuato-explanate anteriorly, the sides strongly sinuate towards 
the base, the compressed dorsal hump angular as seen in profile, 
a space on the dise behind it bare and granulate. Elytra elongate, 
parallel, much wider than the thorax, somewhat depressed, narrowly 
