158 0CT0G0N0TES. 



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

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

 pression extends obliquely towards the anterior angles, giving a 

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

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

 longitudinal indistinct markings rufo-fuscous. Scutellum triangular, 

 distinct, flavous. Elytra punctate -striate (the striae 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 laevigate, 

 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. Antenna', 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, infuscated 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 20. OCTOGONOTES*. 



Drop. 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. 100. 



Orbiyny, Dictionnaire cFHistoire Naturelle (1841, &c). 



Labrum latum, ad latera rotundatum. 



Mandibul^e robustoe, ad apieem acuminata;, ad basin denticulatce. 



Palpi maxillares inJJati, art. 2 ndo sensim incrassato, 3'"" abbreviate, 



valde dilatato, ultimo subidato, depresso. 

 Palpi labiales elongati, subeylindrici, ad apieem attenuati. 

 Antennae filiformes, robustce, in 3 subattenuake et productcf, 

 Oculi distantes, in S globosi. 

 Caput haud productum, breve, depressum. 

 Thorax transversus, ad latera angulatus, plcrumque complanatus. 



* oktio, octo ; ytovia, angulus. 



