— i 9 5 — 



Mesosternum oblique or nearly flat, presternum declivous at tip, not perpendicular, 

 pronotum noi excavated, but only rounded and constricted at base. 



Antennae compressed, subserrate, Plagionotus. 



Anteniue filif irm. 



Mesosternum declivous, Calloides. 



Mesosternum nearly flat, episterna narrower, Arhopalus. 



These genera contain but few species easily known by the markings. 



Clyti. 

 Episterna of methathorax wider; 



Head not carinated; pronotum without transverse ridges Clytus, 



Head carinated; Xylotrechu,s. 



Head not carinated; pronotum with transverse ridges; 



Antennae n-jointed ...Neoclytus. 



Antennae 12-jointed ' Euryscelis. 



Episterna of metathorax narrower, Clytanthus. 



The thighs are spinoseonly in Euryscelis and part of Neoclytus. The 

 thorax of Xylotrechus is usually without ridges, in one species however 

 the ridges are indicated and sometimes quite well developed. The two 

 species of Clytanthus are easily known by the markings. Thev have 

 neither the thoracic ridge nor the frontal carina. 



Anaglypti. 

 Elytra without ivory bands; 

 Eyes oblique, emarginate; 

 2nd joint of antennae Q as long as the 4th; antennae not spinose, Microclytus, 

 2d joint of antennae O $ short as usual. 



3d joint of antenna? spinose Cyrtophorus. 



Eyes rounded, entire, Tillomorpha. 



Elytra with ivory bands, Euderces. 



The form of the eye is figured for each of these genera. Tillomor- 

 pha has it smaller as if the upper emarginate part had been cut away, 

 and it is nearly round and without any break in its contour. 



The discovery that Microclytus $ lacked the peculiar form of an- . 

 tennoe described in the "Classification" p. 305 (the 2d joint in that sex 

 being as short as usual) required the slight change in the characters used 

 in separating the above genera. 



CYLLENE, Newn. 

 We copy the synopsis by Dr. Horn in Trans. Am, Knt. Soc. VIII. 

 P- 134- 



Antennae with joints 3-5 spinous at tip; 

 Thorax and abdomen uniformly pubescent ;prosternum wide between the coxae 1 mt 



not prolonged; tip of elytra acutely spinous, antennatus. 



Antennae not spinous; thorax black with yellow bands, abdomen more densely pu- 

 bescent at sides, feebly at middle; 



