of the Amazon Valley. 273 



interrupta^ nigris ; femoribus robustis, clavatis ; corpore 

 subtus pube sericea cinereo-fulva dense vestito, protlio- 

 race opaco lanuginoso punctate. 

 Long. 1 un. 1 lin. c? . 



Allied to 8ph. ■procerum, Erichs. (in Schomb. Reia. 

 Brit. Guiana), differing chiefly in colour, and in the 

 markings of the elytra. 



Hah. — Tapajos. I found it in repose on a leaf in the 

 forests. 



Genus Peribceum. 



Thomson, Syst. Ceramb. p. 245; Lacord. Gen. viii. 318. 



According to Lacordaire, this genus is distinguished 

 among the Sphceriince, by the pedunculate femora, i.e., 

 slender at the base and clavate beyond the middle, by 

 their unarmed apices, and by the integument being 

 glabrous or not clothed with fine pubescence as in 

 8phcerion proper. One of the species here described 

 invalidates this definition, as it possesses the abruptly 

 clavate form of the femora characteristic of Ferihceimh, 

 and their bispinose apices, which is distinctive of the 

 genus Nephalius. 



1 . Periboeum pubescens. 



Ceramhix puhescens, Olivier, Ent. No. 67, p. 33, pi. xviii. 



f. 135. 



Minus elongatum, postice attenuatum, rufo-castaneum, 

 nitidum, longe et sparsim griseo-hirsutum ; capite et 

 dimidio apicale elytrorum nigris, interdum capite solum 

 nigro ; thorace tuberculo valido laterali aliisque quatuor 

 et carina mediana dorsalibus ; elytris sparsim punctulatis, 

 punctis piliferis asperatis, apice truncatis et unispinosis. 



Long. 4>-8\ lin. c? $ . 



Common throughout the Amazon region. Varies from 

 clear reddish-chesnut, with the head alone black, to dark 

 chesnut, with the head, thorax, apical half of the elytra, 

 and abdomen, black. The head, basal joint of the an- 

 tennse, and underside of the prothorax, are clothed with 

 grayish tomentum. 



