190 



AI,LO( . IlItoilA. 



anterior angles are much depressed ; the sides marginate ; at the 

 base (when viewed obliquely) is a broad transverse depression ; the 

 surface is finely and thickly punctate throughout. Scutelhvm tri- 

 angular, impunctate. Eh/tra considerably broader than the thorax, 

 robust, punctate-striate (the stria; becoming almost obsolete as they 

 approach the apex) ; an antemcdial transverse depression gives a 

 prominence to the surface near the scutellum, extending obliquely 

 upwards, and terminating in a short and deep longitudinal fovea at 

 the apex of the shoulders, between the eighth and ninth stria? : the 

 surface (when viewed under a high power) is clothed throughout 

 sparingly with an obsolete flavous pubescence ; this pubescence is 

 more apparent near the apex. Antenna filiform, robust, tolerably 

 short, subincrassated, flavous, the joints seven to ten being fuscous. 

 Legs flavous throughout. 



Brazil. 



A. vemistum may be recognized from most of its congeners by its 

 concolorous elytra ; it is distinctly broader than the two following 

 species, which also are concoloi'ous. 



10. Allochroma nigro-marginatum. 



A. oblongo-ovcde, robust nm, subpubescens, fiavo-ferruginewm ; ca- 

 pite brevi, ad basin earmato ; tkoraee transversa, angulis antids 

 svhtruncatis, punctulato, ad basin pubescent!, ad marginationem 

 piceo ; elytris latis, punctato-striatls ; antennis dilataUs, art. 1-5 

 jt(tvis,Q-9 rufo-piceis, 10 et 11 rufo-ferruijim is : pedibus Jlavo- 

 ferrugineis. 



Long. corp. 1 lin., lat. g lin. 



Oblong-oval, broad, robust, very finely pubescent, of a flavo- 

 ferrugineous colour throughout. Head short, depressed, slightly 

 elongated ; in front of the head is an obsolete transverse triangular 

 depression ; above the insertion of the antenna? are two oblique 

 carinations extending transversely to the base of the head ; eyes 

 situated at the base of the head ; the surface is finely punctate. 

 Tliora.v transverse ; the anterior angles depressed and truncate ; the 

 sides marginate and rectilinear (very slightly subsinuate towards 

 the base) ; the surface is very finely punctate, clothed with pubes- 

 cence towards the sides and apex ; at the marginatum piceous. 

 Scutellwm small, triangular, pubescent. Elytra broad, robust, finely 

 punctate-striate. transversely and antemedially subdepressed j finely 

 flavo-pubescent. Antennas, robust, slightly dilated towards the 

 middle; the joints one to five are flavous, six to nine rufo-piceous, 

 ten and eleven rufo-ferrugineous. Legs flavo-ferrugineous throughout. 



Rio Janeiro. In the collection of the Rev. II. Clark. 



