214 



RHYNCHOPHORA. 



[Curculioninee 



a*. Mandibles thickly punctured and pubescent on their surface, 

 sharp and without a tooth on their internal edge, and curved 



into a sharp hook at apex SITONINA. 



h*. Mandibles glabrous, or rarely furnished with a few patches 

 of rough hairs, on their upper surface, bilobed at apex or den- 

 tate on their inner side before apex. 



af. Posterior margin of the second segment of the abdomen 

 produced at each side and extending over the third segment 



to the base of the fourth TTCHIINA. 



bf. Posterior margin of the second segment of the abdomen 



distinct in all its extent from the base of the fourth, 

 aj. Ephnera of mesosteruum not extending between the 

 thorax and elytra and with its extremity invisible from 



above ; anterior coxae usually contiguous. 

 *. Tarsi without ouychium, and terminating at the third 



joint, which is strongly dilated ANOPLINA. 



**. Tarsi normal, furnished with onychium. 



f. Posterior femora strongly thickened and adapted 

 for leaping ; eyes almost meeting on upper surface 



of head ORCHESTINA. 



ft. Posterior femora not adapted for leaping ; eyes 



widely separated on upper surface of head. 

 J. Tarsal claws connate. 



aa*. Eyes widely separated beneath by the rostrum 

 which is stout and, as a rule, nearly as wide as 

 head ; tibiae armed with a large hook or tooth at 



apex ; size large LIXINA. 



bb*. Eyes almost meeting beneath rostrum, which is 

 slender, or comparatively slender, and much 

 narrower than head ; tibiae armed with a small 



tooth ; si/e small or very small SMICRONYCHINA. 



JJ. Tarsal claws free, 

 aa*. Eyes extremely prominent ; tarsal claws almost 



always appeudiculate ANTHONOMINA. 



bb*. Eyes not or scarcely prominent ; tarsal claws 



not appendiculate. 



aaf. Surface of thorax uneven and in places exca- 

 vate ; eyes vertical ; upper surface scaly . . GEONOPINA. 

 bbf. Sui face of thorax smooth or slightly uneven 



in front, but not excavate, 

 aaj. Tarsal claws strongly toothed at base on 



their under side ELLESCHINA. 



bbj. Tarsal claws simple. 



aaa*. Ely trabroadlyand separately rounded at 



apex ; anterior coxae narrowly separate. ACALYPTINA. 

 bbb*. Elytra jointly rounded or separately 

 acuminate at apex ; anterior coxa> 



contiguous. 



aauf. Third joint of tarsi very short be- 

 hind base of onychium, strongly 



bilobed. 



miu t. Posterior tibiae without or with a 

 very obsolete hook at apex; ros- 

 trum not carinate ; trochanters 

 without a long projecting seta . HYPEBITTA. 

 bbb J. Posterior tibias with a more or less 

 strong hook or spur at apex ; 





