394 RHYNCHOPHORA. | Rhyncolus. 
R. gracilis, Rosenh. Elongate, rather depressed, narrower than 
the preceding species; pitchy brown, shining, glabrous ; antenne 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 hefore apex ; elytra a 
little broader than thorax, with deep punctured strig, 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. 33-4 mm. 
In rotten wood of beech, &e.; very rare; Esher (Hamlet Clark); Smallheath, 
Birmingham, and Sherwood Forest (in birch twigs) (W. G. Blatch). 
R. ater, L. (chloropus, F.). This species may be known from the 
two preceding by its short and stout rostrum ; it is more elongate and 
parallel-sided than FR. cylindrirostris ; pitehy black, glabrous, with the 
antenne 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 striz, interstices punctured in minute rows and some- 
what strigose, L. 33-4 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 antenns 
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 antennez and legs lghter; 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 striz ; 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, &c.; rare; London district (Janson); Wanstead (Power) ; 
Leytonstone (Gorham) ; Epping Forest (Blatch). 
Thomson (Skand. Col. vii. pp. 842, 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 
