166 APALOTRIUS. 



transverse medial depression extends obliquely towards the anterior 

 angles ; the surface is almost impunctate, subpubescent, flavous. 

 Scutellum triangular, impunctate, black. Elytra slightly broader 

 than the thorax, with rows of punctures arranged as striae ; black, 

 shining; two transverse bands (which are formed by dense white 

 pubescence) extend from the first stria to the margination, one 

 medially, the other nearer the apex ; at the humeral angles is a small 

 circular spot, and along the suture for a short distance from the 

 scutellum is a narrow linear marking of the same colour and forma- 

 tion. Antennae tolerably long, filiform, ferrugineous ; the joints eight 

 to eleven being testaceous. Legs fulvous, on the upper surface fus- 

 cous ; the inflation of the posterior claw bright ferrugineous. 



This species differs from 0. sumptuosus (to which it is nearly 

 allied) in the colouring as well as in the disposition and size of the 

 markings on the elytra. 



From the district of the River Amazon. 



Genus 27. APALOTRIUS*. 



PALPI MAXILLARES robusti, breves, plerumque geniculati, art. 3** dila- 

 tato, globoso. 



PALPI LABIALES cylindrici, attenuati. 



ANTENNA filiformes, robustce. 



CAPUT breve, depressum, fere verticale. 



THOEAX latus, transversus, rectilinearis, antice tenue constrictus. 



ELYTRA lata, robusta, subcylindrica, punctato-striata. 



PEDES robusti ; tibiis posticis a retro super tarsi insertionem calcare 

 armatis. 



Labrum subcircular, broad. 



Mandibles robust, at the inner margin armed with a single short 

 but acute tooth. 



Maxillary palpi (Tab. VII. fig. 1m) broad, robust, generally geni- 

 culated ; the basal joint minute ; the second gradually broader to- 

 wards the apex and obliquely truncate ; the third broader and not 

 longer than the second, also obliquely truncate at the apex; the 

 terminal joint much narrower than the third, and conical. 



Labial palpi (Tab. VII. fig. 1 n) minute, somewhat more elon- 

 gate than in the genus Octogonotes ; the first and second joints at- 

 tenuated at the base ; the ultimate joint attenuate. 



Antennae approximate, situate between and below the inner mar- 



* airaXos, gracilis ; 0pi?, coma. 



