208 SERRICORNIA. [ Cis. 
C. bidentatus, Ol. Oblong, convex, very scantily pubescent, 
pitehy black; antenne ferruginous; thorax convex, broader than long, 
produced on anterior margin, with sides and base finely bordered, 
closely and finely, but distinctly and not rugosely punctured, posterior 
angles obtuse ; elytra as broad and twice as long as thorax, regularly 
and distinctly punctured; legs ferruginous. J. 23 mm. 
Male with the clypeus bidentate at apex, and with the thorax sinuate 
at apex on anterior margin, and furnished on each side of the sinuation 
with a distinct strong tooth. 
In boleti on old trees; also in decayed stumps; rather local, but not uncommon ; 
London district, common; New Forest ; Glanvilles Wootton; Devon; Somerset ; 
Worcester ; Salford Priors ; Cannock Chase; Cambridge; Repton; Sherwood Forest ; 
Nocton, near Lincoln; Scarborough ; Northumberland and Durham district ; Scot- 
land, local in Polypori, Clyde, Tay, and Moray districts; it probably occurs not 
uncommonly in Ireland. 
C. alni, Gyll. (betule, Zett.). Elongate, shining, rather depressed 
on disc, with very scanty pubescence, almost glabrous, of a dark pitchy 
brown colour, often inclining to castaneous; antenne ferruginous, with 
the club darker; thorax as long as, or a little longer than, broad, with 
sides slightly rounded and rather finely, but very distinctly margined, 
posterior angles obtuse, but well marked, upper surface closely but 
distinctly punctured, with traces of a central channel often apparent; 
the front part of the thorax is often lighter than the rest of the body ; 
elytra rather long, two and a half times as long as thorax, usually with 
a lighter patch at shoulders and another behind middle, distinctly and 
regularly and not very closely punctured ; legs pitchy red or ferruginous 
with the femora rather darker, L, 2-24 mm. 
In boleti on old stumps, &c.; occasionally by sweeping; as a rule rare, but not 
uncommon in a few localities; London district, Darenth, Hawkhurst, Caterham, 
Reigate; New Forest; Mount Edgecumbe Park, Plymouth; Quy Fen, Cambridge, 
bred by Dr. Power; Littlington; Cannock Chase; Needwood Forest ; Dunham 
Park, Manchester, on decayed oak; Scotland, very rare, Tay and Dee districts 
(Rannoch, &c.). 
C. nitidus, Herbst. (Eridaulus nitidus, Thoms.). A small short 
and very convex species, shining, almost glabrous, of a pitchy brown 
colour, inclining to castaneous; head very finely punctured, antenne 
red with the club dark; thorax a little broader than long, with anterior 
angles acute and somewhat thickened, and the sides and base finely 
margined, posterior angles rounded, upper surface finely but not very 
thickly punctured with traces of a smooth central line; elytra as broad 
and twice as long as thorax, rather coarsely and shallowly punctured, 
and with an intermixture of fine punctuation; legs testaccous. 
L. 13-15 mm. 
Male with the clypeus emarginate at apex, and produced on each side 
in a small tooth. 
In boleti, also in old stumps, fallen boughs, &e.; locally common; Chatham, Rich- 
