160 OCTOGONOTES. 



claw is bifid, thickened at the base, not armed on the inner sur- 

 face with an inferior tooth. Posterior femora incrassated, ovate, at 

 the apex grooved for the reception of the tibia. The tibia (Tab. VI. 

 fig. 6 </) short, straight : when seen from behind, the posterior sur- 

 face is flattened, marginate, and near the apex depressed into a lon- 

 gitudinal groove ; this margination is not produced (as in the genus 

 Monoplatus) into a spur, but is in outline subsinuate ; at the apex 

 the tibia is dilated, and margined near the insertion of the tarsus 

 with a series of sharp and regularly disposed comb -like teeth ; the 

 extreme apex is produced into two robust incurved claws. Tarsi 

 attenuate ; the first joint elongate, dilated at the apex ; the second 

 of the same form, but shorter ; the third minute, ovate ; the fourth 

 produced into a globular inflation, which conceals from above the 

 apical claw. 



The sexes of this genus may be separated at once by the relative 

 lengths of the antennae : in the males the antennae are longer 

 and slightly more attenuated, the head also is narrower, the eyes 

 are more globose, and the body somewhat less robust. There is a 

 slight variation also in the form of the thorax : in some species the 

 anterior angles are more or less (obsoletely) truncate, and it is the 

 aspect of one of these examples which probably suggested the name 

 of the genus, by giving to the thorax the semblance of being eight- 

 sided. As a rule, and in the old typical species, 0. Banoni, Drap., 

 the thorax is hardly more than six-sided. 



1. Octogonotes brunneus. (TAB. VI. fig. 5.) 



0. ovalis, depressus, latus, lanuginosus, brunneus; capite brevi, 

 subdepresso, inter oculos transverse foveolato, granulato ; thorace 

 transverso, quadrato, ad latera marginato et (ad medium) leviter 

 angulato ; elytris robustis, punctato-striatis ; antennis flavis 

 (articulis 58 nigris) ; pedibus brunneis. 



Long. corp. 4^- lin., lat. 2 lin. 



Oval, broad, somewhat depressed, clothed throughout with a 

 golden-brown pubescence, which varies in shade in different ex- 

 amples. Head short, transverse, slightly elongated in front; eyes 

 small, distant ; between the eyes and the insertion of the antenna is 

 a triangular irregular depression ; the surface of the head is roughly 

 granulated, very finely pubescent; of a rich golden-brown colour. 

 Thorax transverse, with the anterior angles very broadly obliquely- 

 truncate, thus considerably contracting the breadth of the anterior 

 surface ; the sides marginate, and when viewed from above (by 

 reason of the truncation of the anterior angles), apparently pro- 



