198 MANDIBULATA. COLEOPTERA. 



intermediate more slender, and tlie club more elongate arid acute : 

 tlie rostrum is short, considerably dilated, and somewhat depressed 

 at the apex. 



Sp. 1. Betulffi. Ater, nitidus, tennissime pubescens, elytris profunde jmnctato- 

 striatis. (Long. corp. if— 2J lin.) 



At. Betulse. Linne.—Wood, v. i. pi. 15.— De. Betulte. Steph. Catal. 190. No. 

 1967. 



Shining black, with a very delicate dusky pubescence : head thickly punctate : 

 eyes brown : thorax very thickly punctured, with an obsolete dorsal furrow : 

 elytra above convex, a little depressed anteriorly, glossy, regularly and deeply 

 punctate-striate, the interstices with a very obscure series of impressed punc- 

 tures. 



Abundant throughout the metropolitan woods, where the common 

 birch abounds, upon the leaves of which tree it subsists, as well as 

 upon the hazel and oak. " Davidson Vbank."—T. C. Heysham, 

 Esq. " Bottisham."— i^gt;. L. Jenyns. " Raehills,"— J?etJ. W. Little, 

 " Epping."" — Mr. Douhleday. 



Genus CCCXLVIII.— Rhynchites, Herlst. 



Antenna not genieulated, ll-jointed, with the basal joints rather jlong, sub- 

 cylindric, the following shorterj somewhat obconic or rounded, the remainder 

 stout, remote, and forming a subperfoliated oval club. Rostrum deflexed, 

 elongate, sometimes filiform, more or less curved, or straight and slightly 

 dilated at the apex : head elongate, not constricted behind, but inserted into 

 the thorax by a robust neck : eyes lateral, sometimes approximating : thorax 

 conic-cylindric, the lateral margins occasionally with a spine on each side: 

 elyti-a slightly convex, with the back anteriorly depressed : legs robmi, the 

 anterior approximating : feviora unarmed : tibiw rounded, truncate at the 

 apex, and unarmed. 



This genus, which embraces some insects of remarkably lively 

 colours, contains also a series that appears to require more than 

 usual investigation into their specific differences,- as it is evident 

 much confusion occurs in regard to their synonomy, which I pro- 

 pose more particularly to point out hereafter : from the allied genera 

 the present may be known by having the rostrum more or less 

 dilated at the apex, the antennse ll-jointed, the head elongate 

 behind, but not produced into a neck, the thorax conic-cylindric, 

 and the body somewhat depressed. 



