Mr. Westvvood on the Affinities of Clinidium. 219 



the head, thorax, and elytra respectively being oblong-quadrate in Cli- 

 nidium, while in Rhysodes they are oblong-ovate. The sculpturing of 

 the thorax is also distinct in the two genera, the lateral channels in 

 Clinidium occupying only the basal angles, whilst in my specimen of 

 Rhysodes they run parallel with the entire lateral margin. Dalman, 

 however, describes these " Sulci laterales' ' of Rhysodes as being " basi 

 " dilatati latissimi, antrorsum angustati, ultra thoracis medium in puncta 

 " impressa desinentes," although in my specimen they are of the entire 

 length of the thorax, as represented in my figure. The striation of the 

 elytra is also distinct, there being in each elytron of Rhysodes, " Striae 

 " octo impressse, regulariter et profunde punctatae, suturales ad apicem 

 " usque continuse, intermedise ante apicem a ruga obliqua ? cum strioli 

 " punctata interruptae; interstitia angusta convexa laevissima impunctata;" 

 whilst in Clinidium the elytra are described by Mr. Kirby as being " pro- 

 " fundfe sulcata vel porcata, porcis sex elevatis ; intermediis abbreviatis, 

 " duabus longioribus apice connatis ; apex ipse et basis coleoptrorum 

 " apud suturam in foveam magnam et profundam excavati." And last, 

 but not least, Clinidium is apterous, and Rhysodes furnished with folded 

 wings. 



Having thus, I trust, satisfactorily established the intimate connexion 

 of these two genera, I now proceed to trace their joint affinities and ana- 

 logies ; and in order to do this satisfactorily, I shall, in the first place, 

 state the opinions of Dalman, Latreille, and Kirby upon the subject. 



With regard to Rhysodes, the original location appears to have been 

 amongst the Terediles, being placed by Dejean, in his Catalogue des Co- 

 leopteres, p. 40, between Oupes and PtiUnus. Dalman, however, in 

 the Analecta Entomologica, disproves this location, observing, " Certe 

 " peculiare genus, nee facile in uUa familia nota pentamerorum ponen- 

 " dum. Insectum primo intuitu habitum fere profert Colydii vel Lycti, 

 " sed tarsorum numerus et antennarum forma nirais distant." Latreille, 

 in the Families Naturelles, p. 354, in again placing this genus with Cu- 

 pes amongst the Ftinidce, observes, in corroboration of Dalman's re- 

 marks, " Ce dernier genre (Rhysodes) , quoique pentamere, semble appar- 

 " tenir plus naturellement a la famille des Xylophages ou a celle des 

 " Platysomes," (Cucujidae); and yet the same author, in the second edi- 

 tion of the Regne Animal, Vol. IV., p. 487, still retains it in the same 



