394 RHYNCHOPHORA. [Rhyncolus. 



R. g-racilis, Rosenh. Elongate, rather depressed, narrower than 

 the preceding species ; pitciiy brown, shining, glabrous ; antennae and 

 legs pitchy red ; rostrum nearly as long as thorax, cylindrical, shining, 

 slightly curved ; thorax scarcely longer than broad, strongly punctured, 

 with a smooth central line, sides not constricted before apex ; elytra a 

 little broader than thorax, with deep punctured striae, interstices 

 irregularly punctured ; according to M. Bedel the interstices of this 

 species are smooth or imperceptibly punctured ; it may be known from 

 the preceding by its more elongate form, almost flat eyes, and by not 

 having the sides of the thorax constricted before apex, and from those 

 that follow by the longer rostrum. L. 3|-4 mm. 



In rotten wood of beech, &c. ; very rare; Esher (Hamlet Clark); Smallheath, 

 Birmingham, and Sherwood Forest (in birch twigs) ( W. G. Blatch). 



R. ater, L. (chlorojnts, F.). This species may be known from the 

 two preceding by its short and stout rostrum ; it is more elongate and 

 parallel-sided than R. cyliudrirostris ; pitchy black, glabrous, with the 

 antennae and legs pitchy ferruginous ; rostrum subquadrate with a 

 central channel ; thorax evidently longer than broad, narrowed in front, 

 regularly, closely and moderately strongly punctured ; elytra with broad 

 strongly punctured striae, interstices punctured in minute rows and some- 

 what strigose. L. 3|-4 mm. 



In decaying elm, fir, &c. ; local and, as a rule, rare; Sittingbourne, Kent 

 (Hodgson); Chatham (J. J. Walker) ; Walton-on-Naze (Blatch); Sherwood Forest 

 (Turner) ; Scotland, in stumps of Scotch fir, local, Tay and Dee districts. 



R. truncorum, Germ. (s.g. Stereocorynes, Woll.). This species 

 may be known by having the eyes quite flat and the club of the antennas 

 truncate and pubescent only at apex ; the anterior femora are angularly 

 dilated on their underside and the first joint of the tarsi is elongate ; of 

 rather shorter and broader form than the preceding, pitchy black or dark 

 pitchy ferruginous, with the antennae and legs lighter ; rostrum short 

 and broad, closely punctured ; thorax longer than broad, narrowed in 

 front, regularly, moderately closely, and strongly punctured, with traces 

 of a smooth central line ; elytra slightly broader than thorax, with 

 moderately strong punctured striae ; interstices rather convex, punctured 

 in minute rows and slightly strigose. L. 3| mm. 



Male with the rostrum slightly narrowed towards apex, one and a half 

 times as long as its breadth at base. 



Female with the rostrum cylindrical, twice as long as its breadth at 

 base. 



In decaying maple, Ac. ; rare ; London district ( Janson) ; Wanstead (Power) ; 

 Leytonstone (Gorham) ; Eppiug Forest (Blatch). 



Thomson (Skand. Col. vii. pp. 342, 343) separates R. cylindrirostris 

 from R. lignarius, chiefly on the ground that the former species has the 

 elytra furnished with series of punctures, whereas in the latter they are 



