194 CLAVICORNIA. [Cenjlonina. 



the former of which has the chib phiinly 2-jointed, whereas in the hitter 

 it is solid ; they are small oblong or oval insects, and are distinguished 

 by having the last joint of the palpi small and acicnlar, and the penulti- 

 mate joint dilated ; all the coxae are widely separated ; the genns Cerylon 

 alone occurs in Britain. 



CERYIiON, Latreille. 



About thirty species are contained in this genus, which are widely 

 distributed throughout the world, representatives being found in ISTovth 

 and South America, Ceylon, Tahiti, New Caledonia, Madagascar, &c. ; 

 nine or ten species are found in Europe, of which four are British ; for 

 a description of these the student is referred to a paper by myself in the 

 Entomologists' Monthly Magazine, vol xxiii, pp. 71-76 ; the species are 

 small robust insects, and live under bark of decaying trees, logs, &c. ; 

 sometimes they are found in ants' nests ; the shape of the thorax differs 

 considerably in the two sexes, a point that must be carefully noticed. 



The laiva of C. histeroides is described by Perris (Ann. Fr. 1853, p. 61fi) ; it is elon- 

 gate, somewhat parallel, entirely white with reddish head; head depressed, antennne 

 4-jointL'd, with the last joint as long as all the preceding ; protliorax longer than 

 either nieso- or metathorax, both of which are longer than the abdominal segments, 

 which are of equal length until the last, which is somewhat developed, and has on tlie 

 back two papilte, each furnished with a longhair; it is deeply emarginate behind, and 

 the lobes of the emargination appear to be tritid at apex ; tarsi short and stout, 

 Sjointed ; legs ciliate. The larva, according to M. Penis, lives in the galleries 

 of Hylurgus piniperda, of which it destroys the larva ; it is also found in other trees 

 than pine trees, where it proljably destroys the larvaj of other wood-boring beetles. 



I. Form broader; upper surface pitchy-brown or nearly 

 black. 

 i. Autennse more slender ; basal impressicms of thorax 

 transverse and rather shallow; thorax somewhat 



closely punctured C. histeeoides, F. 



ii. Antenufo thicker; basal impressions of thorax 

 longitudinal and deep ; thorax strongly and spar- 



ingly punctured C. fagi, Bris. 



IT. Form narrower and more parallel ; upper surface nearly 

 always ferruginous testaceous. 

 j. Upper surface slightly convex ; sides of thorax almost 

 parallel ; basal impressions of thorax distinct ; strite 



of elytra becoming evanescent towards apex . . . C. FEERTJGINEUM, <S/?e/'^*' 

 ii. Upper surface much depressed ; striae of elytra reach- 



iu"- apex C. DEPLANATtrM, Gyll. 



C. histeroides, F. Dark pitchy-black, ferruginous or reddish- 

 ferruginous in immature examples, not very convex ; antennse ferruginous ; 

 thorax thickly and rather strongly punctured, in the male a little shorter 

 than broad, and a little widened and rounded in front, so that its greatest 

 breadth is before middle ; in the female it is just as long as broad, very 

 slightly and almost imperceptibly narrowed in front, so that it is broadest 

 at base ; elytra slightly dilated and widened at sides, rather depressed, 



