RHINOTMETUS. 155 



terminal joint elongated, gradually thickened and incurved towards 

 the apex : the claw is hind (Front, fig. 5 e), each limb being cleft 

 into two separate teeth ; it would seem that these two limbs are 

 separable more or less from each other in different examples. The 

 posterior femora (Front, fig. 4/) are somewhat flattened, but (when 

 seen transversely) very short, in form ovate, truncate broadly at the 

 apex, and generally pubescent. The tibia (Front, fig. 4/) is robust, 

 straight, considerably shorter than the femur, somewhat incurved 

 downwards at the immediate base ; the surface (when viewed from 

 behind) is flattened, and longitudinally keeled or marginated: in 

 each of these marginations, near the apex, behind the insertion of 

 the tarsus, is a single broadly defined tooth (corresponding exactly 

 with the row of tooth-like prominences in the females of Monopla- 

 tus) ; this margination is continued on either side to the apex or 

 socket which receives the tarsus, where it is armed with a row of 

 short, sharp, and closely arranged teeth, and at its extreme apex 

 armed further with a single (not double, as in other genera) incurved, 

 robust claw. The tarsus (Front, fig. 4 h) is about two-thirds the 

 length of the tibia, and constricted ; the first joint attenuated, and 

 subdilated at the apex; the second of the same form as the first, 

 but somewhat longer and narrower; the third much shorter and 

 considerably broader, not bilobed ; these three are all margined, and 

 clothed on the under surface with a slight pubescence: from a hollowed 

 socket in the middle of the third joint proceeds the apical joint, 

 elongated, gradually incurved, and terminating in a large globular 

 inflation, which is above (and completely conceals) the apical claw ; 

 this claw (Front, fig. 4 i) is bifid, each member consisting of two 

 distinct teeth, cleft nearly to the base. 



This genus approaches PhysonycJiis in the peculiar construction of 

 the apex of the posterior tibiae ; there is the same terminal claw and 

 the same fringe of sharp and closely disposed teeth around the 

 hollowed socket that receives the base of the tarsus ; and by the 

 parallel and elongated facies of some of its species (as R. marginatum, 

 R. cruciatus, and R. spectabilis) it forms a connecting link between 

 this, the preceding group, and the following genus, Tetragonotes. 



1. Rhinotmetus leptocephalus. 



CFidionvchis leptocephalus, Perty, Conspectus Anim. Artie, p. 110. 

 tab. 22. fig. 5. 



It. oblongo-ovatus, subcylindricus, subelongatus, flavo-pubescens, 

 niger ; capite elongato, ad apicem carinato, ad basin granulato, 

 rufo ; thorace elongato, elytris angustiori, antice subattenuato, 

 punctato, Jlavo-pubescenti, rufo ; elytris robust is, leviter punctato- 



n2 



