38 



PROCEEDINGS OF THE ACADEMY OF 



Note on the Classification of CERAMBYCID.E, with descriptions of new species. 



BY JOHN L. LE CONTE, M. D. 



Since the publication of my essay on the Classification of our Cerambycidae, 

 in the Journal of the Academy, many species have been added to the literature 

 of our fauna; and in restudying the material in my collection, 1 have noticed 

 some characters not yet employed, which seem to render the definition and 

 classification of the tribes more perfect. The general features of the arrange- 

 ment proposed by me in the essay above mentioned have been adopted in many 

 of the works recently published, but the results have not been improved by any 

 important changes of system or characters. 



A very excellent application of the system to the Cerambycidae of the entire 

 globe has been made by Mr. James Thomson in his work entitled " Essai d'une 

 Classification de la Famille des Cerambycides ;" the order of arrangement 

 adopted by him is different from that used in my paper ; commencing with the 

 highest form, the Lamiidae, he ends with the Prionidae. The arrangement is 

 probably more convenient than mine, but it is impossible to preserve even the 

 most important affinities in a linear form The tables given both by him and 

 myself exhibit perfectly the relations of the larger divisions to each other and 

 to other families. 



The important character to which I wish to call attention in the present note 

 is the granulation of the eyes. In certain tribes (e. g. Clytus) the lenses are 

 exceedingly small, in others (e. g. Elaphidion) they are much larger; in the 

 former case the eyes are said to be finely, and in the latter, coarsely granulated. 

 This character is also observed in the Lamiidae, and in both instances serves 

 to define well marked tribes with greater ease and distinctness than any other 

 character which has been observed. 



Using this observation, to perfect our tables of tribe?, (or groups, as I pre- 

 viously called them,) we obtain the following result. 



LAMIIDJ3. 



I. Humeri rounded, wings wanting; (anterior coxal cavities closed, either 



rounded or angulated ; eyes somewhat coarsely granulated :) Monilema, &c. 

 Michthysoma. 



II. Humeri distinct : 



A. Eyes coarsely granulated: 



a. Anterior coxal cavities rounded, closed : Acanthoderus, iEdilis, &c. ; 

 Liopus, Leptostylus, Dectes, &c. 



b. Anterior coxal cavities angulated, closed : Pogonocherus, Eupo- 

 gonius, &c. ; Oncideres, Mesosa, &c. ; Monohammus, Goe3, &c. ; Pty- 

 chodes, Dorcaschema, &c. 



B. Eyes finely granulated : 



a. Anterior coxal cavities angulated, closed behind. 

 Front large, flat, frontal suture concave: Saperda. 



Front convex, frontal suture stiaight: Tetraopes, Oberea, &c. 



b. Anterior coxal cavities open behind: Dysphaga. 



CERAMBYCIDAE. 



No change is proposed in the Lepturini or Spondylini; the eyes are finely 

 granulated in all of our genera except Centrodera Lee. The remainder 

 of the subfamily may be arranged thus: 



I. Anterior coxal cavities angulated, closed behind ; (eyes finely granulated): 



Heliomanes, Stenopterus. 



II. Anterior coxal cavities rounded ; maxilla; elongated, maxillary palpi short ; 



(eyes finely granulated.) 



Anterior coxal cavities closed behind : Callichroma. 

 Anteiior coxal cavities open behind: Rhopalophorus. 



[Feb. 



