a Family of Coleopterous Insects. 657 



the regular shape of the latter, scarcely exhibiting any appearance 

 of the bipartite structure observable in Paussus; the extreme 

 flatness and breadth of the antennae ; the broad legs ; the very 

 hairy basal joints of the tarsi ; and, above all, the formation of 

 the lower lip {labium) and its equal-jointed palpi, and the scapes 

 upon which they are inserted, — cannot be regarded otherwise 

 than as intimating a group generically distinct from the true 

 Paussi. 



It may also be noticed, that the transverse impression near 

 the base of the clava of the antennve appears to exhibit a ten- 

 dency to an articulate structure, which is confirmed by the den- 

 ticulations of its outer margin. This circumstance is particu- 

 larly noticeable in P. aplustrifer, in which there are two of these 

 impressions with their corresponding contractions or denticula- 

 tions. 



The situation of the genus in the family appears to be between 

 the species composing my second section of Paussus, and Cera- 

 pterus. In their biarticulate antennae and the formation of their 

 maxillary palpi they approach the former ; and in the general 

 habit of their bodies, as well as in the formation of the basal joints 

 of their tarsi, and in the tendency to articulation exhibited in the 

 clava of their antennae, they approximate to Cerapterus. 



Species 1. Platyrhopalus denticornis. Don. 

 Tab. XXXIII. Fig. 43—48. 



P. brunneo-rufescens, elytris dorso fuscis, sutur4, lat^ ad basin, 

 macuMque utrinque postic^, rufescentibus ; antennarum 

 clavd magn^, latere omni acuto, juxta basin extern^ in- 

 cise ; thorace anticfe utrinque rotundato-dilatato. 



Paussus denticornis. Donov. Epit. Ins. Ind. Paussus, no. 1. 



tab. 5. Jig. 1. Rees' EncycL, Entomology, pi. 8. Jig. 10. & 



10*. sine descriptione. 



4 p 2 Habitat 



