2C4 CLAVicoRNiA. \_Rhizof)hagus. 



i. Colour testaceous or ferruginous, sometimes witli 

 indications of a darker sliudc on disc of tliunix 

 and elytra. 



1. Punctuation of thorax close and fiue . . . . R. DEPRESsrs, F. 



2. Punctuation of thorax more or less coarse, but 



varying in degree, 



A. Elytra depressed. 



a. Strite on elytra finely punctured ; average 



length 3 mm E. PEBFOEATTIS, Hr. 



b. Strire on elytra coarsely punctured ; average 



length 4 mm. H. parallelocoilts, JEJr. 



B. Elytra convex, cylindrical . R. fereugineus, Payk. 



ii. Prevailing colour pitchy or blackish.; base and apex 



of elytra to a greater or less extent light. 



1. Liist segment of alidomen with a plain impres- 

 sion in both sexes, terminated on each bide by a 



small prominence R. NITlDtrLlTS, F. 



2. Last segment of abdomen simple R. dispae, Gyll. 



iii. Fiytra black or brownish-black, with a plainly 



defined yellow spot on each a little before apex . . R. bipusttjlatus, F. 



iv. Colour unloolorons black R. POLITUS, Hellw. 



V. Elytra blue or Lhiisb-green ; head, thorax, and 



scu'tellum shining black R CCERTJLEIPENNIS, Salilb. 



^. cribratus, Gyll. Of a dark ferruginoits colour, depressed, rather 

 sliining ; head rather shorter than in most of the other species, thickly and 

 strongly punctured, antennae with the club truncate, a character which 

 will at once distinguish the species ; thorax about as long as broad, 

 gradually narrowed behind, very coarsely and diffusely punctured ; elytra 

 somewhat widened in the middle with rows of strong punctures ; under- 

 side of head and sides of body strongly punctured. L. 3^ mm. 



Under bark and at roots of trees, especially oaks; not common ; Weybridge, Esher, 

 Richmond Park, Reigate, Tilgate Forest, Birch Wood, Dulwich, New Fore -it ; Mount 

 Bilgecumbe, Plymouth (Wollaston) ; Knowle; Robin's Wood, Repton ; Sherwood 

 Forest; Studley Park, Ripon, in fungus (Waterhouse) ; Scarborough; Stretford ; 

 on decayed roots of lime trees, Withington Common, near Manchester (Chappell) ; 

 Hartlepool ; Northumberland district, rare, Houshel and Hartford Bridge ; Scotland, 

 very rure, Solway district ; it is not recorded in Dr. Sharp's list, but I have lately 

 received a specimen taken by Mr. W. D. R. Douglas at Orchardton near Castle 

 Douglas under fir bark ; Ireland, Galway, locally common, and Westport (co. Mayo) 

 (.1. J. Walker). 



£1,. depressus, F. Light rust-red, Avith suture of elytra usually 

 darker ; body depressed ; head of male largo, about as broad as thorax, 

 of female narrower ; thorax longer than broad, widest in front, thickly 

 and very finely punctured ; elytra with very finely punctured strite, first 

 interstice with a row of widely separated fine punctures (which is found 

 also in other species), second interstice widened and irregularly punctured 

 at base. L. 2-4 mm. 



Under bark of oak, fir, &c. ; somewhat local, but not uncommon, and apparently 

 generally distributed thrcughout the greater part of the kingdom. 



Ti. perforates, Er. Of a light lUst-rcd or testaceous colour with the 



ti 



