106 MANDIBULATA. — COLEOPTERA. 



the antennae : thorax acutely margined, a little convex, smooth, with a channel 

 in the middle, and on each side at the base two impressed striae, of which the 

 inner one is longest, and terminates in a thickly punctulate bilobed fovea : 

 elytra pitchy-black, striated, the striae somewhat crenated, and a little punc- 

 tate, with three larger dots on the disc, and a series of impressions on the 

 second stria from the margin ; the internal stria very short : body beneath 

 glossy black, subpunctate, the tip reddish : the mouth, palpi, and legs pitchy- 

 red : the antennffi pitchy, with the base palest. 



Two specimens only of this species have, as yet, been under my 

 examination ; they were taken near London, and are in my col- 

 lection; it is totally distinct from the Ca. Anthracinus, Illiger, 

 which belongs to the genus Omaseus, and will be hereafter de- 

 scribed, it having been recently taken in England. 



Genus XLI. — Pogonus, Ziegler. 



Palpi with the terminal joint somewhat ovate, truncate : the internal maxillary 

 very slender: labrum transverse, emarginate: mandibles sUghtly curved, 

 acute, internally denticulate at the base : mentum deeply emarginate ante- 

 riorly, with a bifid central lobe. Antenna with the third joint longest: head 

 subtrigonal : thorax subquadrate, truncate, the hinder angles acute : elytra 

 depressed, entire : wings two : anterior tarsi of the males with three dilated 

 joints. 



This is evidently a maritime genus (at least in Britain), the 

 species of which it is composed residing beneath sea-weeds on the 

 south and eastern shores of England. In the brilliancy of their 

 colours they approach towards the insects of the genus Poecilus, but 

 may readily be distinguished from them by their inferior size, by 

 the form of the terminal joint of the palpi, of the mentum, and of 

 the labrum. 



Sp. 1 . Burrellii. Firidi-ceneus, elytris ochraceis nebuld dorsali fuscescente, ore 



antennis jjedibusque pallidejerrugineis. (Long. corp. 3 — 3f lin.) 

 Po. BurreUii. Curtis, i. pi. i^l.—Steph. Catal. p. 22. No. 174. 



Smooth glossy : head and thorax bright coppery-green, the former with a deep 

 longitudinal impression on each side between the eyes; the latter with a 

 dorsal channel, and a triangular impression anteriorly, a fovea at the base on 

 each side, and the base itself punctated : elytra pale ochraceous, with a brown- 

 ish cloud on the back, striated, the striae punctate, the external one Avith a row 

 of obsolete impressions, and the third with three larger ones ; the striie green- 

 ish : body beneath green, with the apex rufescent : antennae, legs, and palpi 

 pale rust-coloured. 



AUied to, if not the same as, the Po. iridipennis of Nicolai. 



