80 MANDIBULATA. — COLEOPTERA. 



and an oblong impression on each side near the posterior angle : the margin 

 itself pale : elytra pubescent, dull brassy-green, punctate-striated ; the inter- 

 stices convex, ruggedly punctate ; the margin testaceous-yellow, broadest at 

 the tip : body beneath pitchy-black, pubescent, thickly punctulated : mouth, 

 antennae, and iegs pale yellowish, the tarsi ferruginous. 



A very common species, especially near London ; occurring in 

 damp banks, beneath stones, in gravel and clay-pits, &c. in the spring. 

 The Rev. L. Jenyns informs me that he has only once observed it 

 near Bottisham. 



t Sp. 8. xanthopus. Obscure eeneus, capite thoraceque subnitidis, thorace punctis 

 impressis, elytris striatis, striis punctafis, antennis pedibusque rufo-ferru- 

 gineis. (Long. corp. 8^ Kn.) 



Ch. xanthopus. Steph. Catal. No. 112. 



Head and thorax of a slightly glossy seneous ; the former smooth, and clothed 

 with black down : the latter longer than broad, and thickly punctate, with a 

 somewhat obsolete channel down the centre, and an elongate longitudinal 

 impression on each side near the hinder angle, the latter greenish : elytra a 

 little convex, obscure dusky aeneous, with rather obsolete striae, the latter 

 distantly punctated; the interstices nearly smooth: body beneath dusky- 

 black : legs ferruginous : labrum, palpi, and three basal joints of the antennae 

 also ferruginous, the rest of the antennae dusky. 



This large species is unique in the cabinet of W. Swainson, Esq., 

 F. L. S., &c., who obtained it from his father's collection, but he is 

 unable to furnish me with its habitat. It differs from the other 

 indigenous species by having the second joint of the antennae 

 remarkably short, and the following above three times the length 

 of the second ; the head is clothed with down, and the body more 

 convex than usual in this genus : it agrees in a few particulars with 

 Ch. orientalis of De Jean, but differs in many important characters, 

 particularly in having the thorax longer than broad. 



Genus XXXI . — Callistus, Bonelli. 



Palpi with the terminal joint elongate-ovate, attenuated at the tip ; internal 

 maxiUury uniarticulate : labrum transverse, obsoletely emarginate : mandibles 

 very narrow, acute, a little bent, denticulated at the base: mentum eTaaxgrnSite 

 anteriorly, with a simple tooth in the centre. Antenna; pubescent, shghtly 

 compressed: head subtrigonal: thorax punctate, convex, truncate-cordate: 

 elytra entire, pubescent : wings two : anterior tarsi of the males with three 

 dilated joints. 



Entomologists are also indebted to the perseverance of Bonelli 

 for the characters and name of this genus, of which a detailed ac- 



