various Central American Coleoptera. 139 
*Trichodesma armata, Nn. sp. 
Elongate, piceous, the antennae, tibiae, and tarsi ferruginous; 
mottled with grey, fulvous, and whitish pubescence, intermixed 
with a few long semi-erect hairs and black setae, the grey pubescence 
predominating and somewhat scattered on the elytra, the whitish 
pubescence on the latter condensed into a A-shaped mark on the 
shoulders and two transverse rows of small fascicles near the apex, 
and the fulvous hairs into various spots at the base and three 
narrow oblique streaks at the middle (the inner one meeting the 
corresponding streak on the opposite elytron at the suture, the two 
forming a common A-shaped mark, which extends some distance 
down the third interstice), the black setae clustered into a few 
small tufts, two in front of the dorsal hump of the thorax and 
one at about the basal fourth of the third elytral interstice 
being more conspicuous than the rest. Antennae rather long, 
the three joints of the club elongate, moderately broad, the terminal 
joint about one-half longer than the preceding. Thorax moderately 
explanate anteriorly, the sides acutely dentate behind this, and 
sinuously converging thence to the base; densely punctate, obliquely 
biplicate on each side of the angular dorsal hump, and with 
the triangular bare space at the base finely granulate. Elytra 
elongate, a little wider than the thorax, parallel, narrowly truncate 
at the tip; with sinuous rows of moderately coarse transverse 
punctures, the interstices here and there finely granulate. Beneath 
very densely minutely punctulate, with scattered coarser punctures 
intermixed, the pubescence fine, fulvous in colour. 
Length 4, breadth 2mm. (? 3.) 
Hab. GuatEMataA, Cerro Zunil, Pacific slope (Champion). 
One specimen, in very fresh condition. Smaller and 
less elongate than 7’. mexicana, the elytral vestiture finer, 
differently coloured, and not clustered into large tufts, 
the thorax sharply toothed at the sides behind the middle. 
The clothing on the elytra and under surface does not 
completely hide the sculpture. 7’. dentatithorax, Pic, from 
Brazil, must be an allied form; it is described as having the 
thorax quadridentate on the disc and the elytra furnished 
with a pilose humeral gibbosity. 
PETALIUM. 
Petalium, Leconte, Class. Coleopt. N. Am. p. 204 (1861), 
and Proc. Acad. Phil. 1865, p. 234; Fall, Trans. 
Am. Ent. Soc. xxxi, pp. 211-213 (1905); Pic, Cat, 
Anobiidae, p. 58 (1912). 
