166 Mr. J. O. Westwood on 
breviori, tertio longiori attenuato. Mentum cordatum, basi 
truncatum. Palpi labiales minuti, scapo basali haud conspi- 
cuo. Labium e lobis duobus sub palpos conspicuis constans. 
Antenne 10 articulate, clava rotunda, articulo 8vo infundi- 
buliformi. Pronotum integrum, postice fere latitudine elytro- 
rum. Elytra magna convexa, striata etsetosa. Tibice antice 
3-dentatee, posticee 4 in medio haud dentate. Ungues sim- 
plices. (Insecta Americee meridionali propria.) 
Sp. 1. Chetodus piceus, Westw. (Pl. XI. fig. 4.) 
C. piceus, nitidus, capite thoraceque rudé punctatis, elytris regu- 
lariter striatis, luteo-setosis, pedibus valde setosis, antennarum 
clava lutea. 
Long. corp. lin. 3. 
Habitat in Brasilia, D. Swainson. 
In Mus. Soc. Zool. Lond. 
Caput clypeo rotundato, tenue marginato, hoe et pronotum 
vagé et rudé punctatis, lateribus marginatis et setulosis. Elytra 
striata, singulo striis 12 simplicibus aque distantibus et setosis. 
Pedes mediocres, tibiis anticis serrulatis, apice tridentatis. 
Sp. 2. Chetodus irregularis, Westw. (Plate XI. fig. 4 f.) 
C. piceus, nitidus, capite thoraceque grossé punctatis, elytris 
irregulariter striatis, antennarum clava obscuriore. 
Long. corp. 23. 
Habitat in Brasilia. In Mus. D. Melly. 
Clypeus rufescens, tenue marginatus punctatus. Pronotum 
irregulariter et gross¢ punctatum, lateribus subserratis et setosis. 
Elytra striata, striis simplicibus, singulo striis 10; Ima suturali, 
2da et Stia, 4a et 5tia approximatis, reliquis externis aque dis- 
tantibus, punctis perpaucis ad margines striarum intermediarum. 
Pedes mediocres, tibiis anticis 3-dentatis. 
The mandibles in this species have the outside near the base 
more gibbous, and the apex not so obliquely truncate within; the 
antenne have the intermediate joints acutely produced within, the 
points being directed backwards ; the maxillae and mentum agree 
with those of the preceding species, but the lobes of the labium 
are more porrected. 
Sp. 3. Chetodus? basalis, Westw. 
C.? piceus, nitidus, elytris basi rufis, punctato-striatis, pedibus 
elongatis gracilibus. 
Long. corp. lin. 2. 
Habitat in Cayenna. In Mus. D. Melly. 
