158 OCTOGONOTES. 



marginate and, medially, slightly dilated; the posterior angles are 

 distinct and subacute; at the base a broad shallow transverse de- 

 pression extends obliquely towards the anterior angles, giving a 

 prominence and a rotundate appearance to the disc ; the surface is 

 punctate, in colour flavous, with the anterior margins and two medial 

 longitudinal indistinct markings info-fuscous. Scutellum triangular, 

 distinct, flavous. Elytra punctate- striate (the striaB being less distinct 

 towards the suture) ; an antemedial depression extends upwards along 

 the suture, and obliquely to the humeral angles, giving a rotundate and 

 subglobose form to the base of either elytron ; the surface is Isevigate, 

 and of a dark-fuscous colour, gradually shading off towards the apex 

 into testaceous ; at the humeral angles (and extending partially along 

 the margination) is a light-flavous marking. Antennae of the. length 

 of the body, filiform ; the first joint incrassated towards the apex and 

 inflected outwards ; the second short, ovate ; the third longer than the 

 first, fine, and slightly incrassated at the apex ; fourth and fifth nearly 

 equal ; seventh to eleventh with a distinct tendency to dilatation ; in 

 colour, first to sixth flavous, seventh and eighth dark fuscous, ninth 

 to eleventh pale testaceous. Legs pale testaceous, infoscated at the 

 base of the posterior femora (suggesting, from their general appear- 

 ance, the immaturity of the example) ; the globular inflation of the 

 posterior claw bright red. 



A single specimen was captured by Mr. Gray at Petropolis (Organ 

 Mountains), February 1857. 



Genus 26. OCTOGONOTES*. 



Drap. Ann. des Sc. Phys. vol. iii. p. 181. 



Dej. Cat. ed. 3 (1837), p. 407. 



Laporte, Hist. Nat. des Anim. Artie. Coleopt. (1840) vol. ii. p. 519. 



Hope, Coleopt. Manual, vol. iii. (1840) p. 169. 



Orbigny, Dictionnaire tfHistoire Naturelle (1841, &c.). 



LABRUM latum, ad latera rotundatum. 



MANDIBUL&; robustce, ad apicem acuminatce, ad basin denticulatce. 



PALPI MAXILLARES inflati, art. 2 nd0 sensim incrassato, 3 tio abbreviate, 



valde dilatato, ultimo subulato, depresso. 

 PALPI LABIALES elongati, subcylindrici, ad apicem attenuati. 

 AmnENNJEjiliformes, robustce, in <$ subattenuatce et productce. 

 OCULI distantes, in <$ globosi. 

 CAPFT haud prodmtum, breve, depressum. 

 THORAX transversus, ad latera angulatus, plerumque complanatus. 



* oKTat, octo ; yow'a, angulus. 



