THE ENTOMOLOGIST. 11 



(This is certainly the ophthalmicus of Stephens's collection, 

 and M. Desbrocher de Loges must have misunderstood me 

 when he says that I referred it to R. sericeus; the description 

 is still much more applicable to R. sericeus. That species, 

 not yet found here, differs at once by its brighter colour, 

 deeply foveolate head, and the coarse punctuation of the 

 interstices.) 



c. Size moderate ; rostrum short and broad ; head quad- 

 rate, constricted behind, nearly glabrous. 



15. R. megacephalus, Germ. Black ; elytra and thorax 

 bluish, the latter irregularly and unevenly punctate, the former 

 rather deeply but not closely punctate-striate. Long. \^ — 2^ 

 lin. Local, and very shy, dropping at the least noise ; on 

 birches. 



(R. tristis, Fah., resembles the preceding in form, but is 

 larger, and the first joint of the posterior tarsi is very short.) 



16. R. Betulae, Linn, Black, finely pubescent; elytra 

 deeply punctate, interstices obsoletely so ; male with the 

 posterior femora incrassate. Long. 2 — 3|- lin. Common. 



d. Size small; rostrum short; body cylindric, glabrous. 



17. R. planirostris, Fah. (uncinatus. Thorn.) Bluish green, 

 not very shining ; thorax thickly punctate ; elytra regularly 

 striate. Long. 1 — 2 lin. Not rare. 



18. R. nanus, Payk. Confounded with the preceding, but 

 considerably smaller, and with the head obsoletely, the thorax 

 and elytra less regularly punctured; rostrum much shorter 

 and angular at the base. Rarer than the foregoing; on 

 birches. 



G. R. Crotch. 



Proceedings of the Entomological Society. 



Nov. 1, 1869.— H. W. Bates, Esq., President, in the chair. 



New British Coleoptera. — Mr. Janson, on behalf of Dr. 

 Power, exhibited the following species of Coleoptera, all new 

 to the British list: — (I) Triarthron Maerkelii of Schmidt, 

 taken near Esher on the 23rd of July, 1869 {also taken by 

 Mr. Oliver Janson, at Shirley, on the 7th of August); (2) Sil- 

 vanus similis of Erichson, at Esher, on the 4th of August, by 



