200 
the gradually thickened basal joint of the antennse. The cha- 
racteristic feature in the coloration of the elytra of Trestonia is 
entirely absent, the colours being dull and uniform. In form 
of body and head, the species described below resembles much 
Trestonia terminata and T. coarctata. 
Peritrox denticollis, n. sp. 
P. subcylindrica, paulo convexa, fuliginosa ; elytris maculis tomen- 
tosis fulvo-brunneis adspersis ; capite inter antennas profunde 
impresso ; thorace transverse ruguloso, lateribus acute tubercu- 
latis. Long. .5 lin. <S . 
Head sooty black, coarsely punctured on the forehead and 
crown, and deeply grooved between the antenniferous tubercles, 
which are closely approximated at their bases, and have their 
inner edges produced into short ear-like lobes. Antennse 
blackish, shining. Thorax subcylindrical, surface uneven, and 
marked with a few sharp transverse wrinkles, besides two 
impressed lines parallel to the hind margin ; lateral tubercles 
conical, acute; colour sooty brown. Elytra cylindrical, narrowed 
only very near the apex, the latter rounded; surface thickly 
punctured, except near the apex, sooty brown, sprinkled with 
spots formed of dingy-tawny tomentum. Body beneath and 
legs pitchy, thinly clothed with ashy pile. 
Santarem, on a dead branch : one example. 
Genus Pachypeza, Serville. 
Serville, Ann. Soc. Ent. Fr. (1835) iv. 
The forehead, muzzle, and eyes in this genus resemble much 
the same features in Oncideres ; but the crown is narrower and 
more depressed between the antenniferous tubercles. The body 
is elongate, but narrower than in any species of Oncideres, The 
antennae have their joints beneath (including the basal joint) 
clothed more or less densely with longish hairs. The thorax is 
cylindrical, about as long as broad, and covered above with 
transverse wrinkles. The pro- and meso-sterna are extremely 
narrow. The legs are short and stout, the femora clavate, the 
tibiae very short and compressed, and the tarsi have the claw- 
joint, although elongated, much less robust and shorter than in 
Oncideres. 
Pachypeza lanuginosa, n. sp. 
P. cylindrica, robusta, fusco-cinerea ; capite latiore ; antennis dis- 
tantibus, articulis sex basalibus infra pilis tenuibus dense vestitis ; 
elytris prope basin confertim et subtiliter granulato-punctatis. 
Long. 9^-10 lin. S 2 • 
Head rather broad, forehead between the antenniferous tuber- 
