CEUTHOKHYNCHUS. 137 



very slightly constricted toward apex, closely and finely 

 punctured, with a fine central furrow, and a small, acute 

 tubercle on each side ; elytra with fine punctured striae, 

 interstices not very convex, without tubercles before apex. 

 L. If 1. Very rare. G. angulosus, Boh. 



d (I. Upper-side almost bare. 



Ovate. Black ; base of antennae and tarsi yellow- 

 brown ; upper-side with scarcely any, under-side diffusely 

 covered with gray scales. Thorax broadly and deeply con- 

 stricted toward apex, with anterior margin rather strongly 

 raised, with feeble central furrow and small lateral tubercles ; 

 elytra with moderately strong punctured striae, interstices 

 flat, apex spined. L. 1^ 1. Eare. C. picitarsis, Gyll. 



a JB, Central furrow on thorax deep. 



a a. Upper-side scantily covered with gray 

 scales ; body black. 



A a. Under -side closely covered with 

 grayish scales. 



Black, somewhat shiny; under-side closely, upper-side 

 scantily covered with grayish scales. Thorax constricted 

 toward apex, strongly punctured, with deep central furrow 

 and small lateral tubercles ; elytra with deep striae, inter- 

 stices flat, wrinkled, with small tubercles toward apex. 

 Male with penultimate ventral segment of abdomen with 

 two small tubercles, placed close together, last segment 

 concave in middle, the concavity bounded by a slight ridge. 

 L. 1^1. Common. C. sulcicollis, Gyll. 



JB b» Under-side very scantily covered with 



grayish scales. 



Allied to C. sulcicollis but with tarsi pitchy-red. Male 

 with penultimate ventral segment of abdomen simple and 

 concavity of last segment bounded by a conical tubercle. 

 L. 1^ 1. Not common. G. alliariae, Bris. 



& h. Upper-side rather closely covered with 

 gray scales ; body leaden-black. 



Leaden-black ; upper-side rather closely, under-side 

 closely covered with gray scales. Thorax nearly as long as 

 broad, with anterior margin not much raised, less strongly 

 punctured than in C. sulcicollis, with deep central furrow 

 and small obtuse lateral tubercles ; elytra with distinct 



