276 COLEOPTERA OF NORTH AMERICA. 



Utilizing the improvements suggested by Tiiomson,* Dr. Le 

 Conte,'!' Schiodte,| and Lacordaire,§ we have adopted from 

 the first edition of this work the following table of the tribes 

 represented in our fauna. The cross relationships can of course 

 only be indicated in the more detailed descriptions which follow, 

 and we are far from believing that the arrangement here adopted 

 can be extended to the immense number of genera found in other 

 countries, with any better success than the two classifications 

 previously devised by Dr. LeConte. 



The tribes of the Cerambycinse genuini may be arranged as 

 follows : the series are indicated very plainly, but can hardly 

 be definitely restricted ; the tribes seem to be limited tolerably 

 sharply, though the cross affinities are frequently perplexing 

 when an attempt is made at a linear arrangement. 



I. Base of antenn<e not enveloped by the eyes ; antennae with the 2d 

 joint rather large, front coxje transverse, not prominent. 



CALLIDIOIDES. 

 Ligiila corneous, eyes variable. I. Asemini. 



Ligula membranous, eyes fine granulated. II. Callidiini. 



II. Base of antenn;B partly enveloped by the eyes ; front coxoe not coni- 

 cal, thougii sometimes prominent ; stridulating plate (absent only 

 in Molorchus) large, never divided ; ligula membranous (except 

 in the group Oemes) ; 2d joint of antennae small (except in one 

 genus of Clytini). CERAMBYCOIDES. 



Eyes coarsely granulated, front coxal cavities open behind (except 

 in Compsa). III. Cerambycini, 



Eyes variable, front coxal cavities angulated, closed behind. 



IV. Obriini. 

 Eyes finely granulated ; 



a. Scutellum rounded, tibial spurs small ; elytra not sinuate ; 

 Legs long, slender, thighs pedunculated and suddenly clavate; 

 front coxal cavities open behind ; 

 Antennae with poriferous system. V. Ancylocerini. 



Antennae without poriferous system. VI. Rhopalophokini. 



Legs slender, thighs not pedunculated, nor clavate, front coxal 

 cavities open behind ; 

 Front C9xae rounded. VII. Paristemiini. 



Front coxae transverse, cavities aaigulated. VIII. Rosaliini. 



* Famille des Cerambycides, par M. James Thomson, Paris, 1860. 



t Note on Classification of Cerambycidse, Proc. Acad. Nat. Sci. Phila., 

 1862. 



t On the Classification of Cerambyces, with particular regard to the 

 Danish fauna, by Prof. J. C. Schiodte, Naturhist Tidschrift, 3d, ii. 483 

 (1864) ; translated in Annals and Mag. of Nat. Hist., 1865. 



§ Genera des Coleopteres, vol. viii. Paris, 1869. 



