255 HYDROPiiiLiDj:. [C('rr>jon. 



Sboreliam ; Deal; WLitstable ; Swansea; Nortlniuiberland district (very rare) ; not 

 recorded from Scotland ; Ireland, recorded from Baldo.vle,-but tins may be in error; 

 1 am raiber inclined to think that ]\lr. Bold was mistaken- in his Northumberland 

 record; he says tliat he had only seen two or three lo.al specimens, and these appa- 

 rently were not captured by himself. 



C. liEemorrhous, Gyll. (ustuMus, Preys., hcemoryJwidalis, F.). Oval, 

 convex, thickly punctured, shining black with the apex of elytra red, 

 the colour being usually distinctly marked ; thorax separately convex, 

 gibbons, slightly depressed at base ("prothorace jjulvinato," Thorns.; 

 " pronotum "bombe isolement, tombant a la base," Bedel), sides rounded 

 and finely bordered ; elytra somewhat depressed on disc, Avith plainly 

 marked strife, the external ones more plainly punctured than the dorsal ; 

 legs brownish, or reddish brown, tarsi lighter. L. 3-3| mm. 



At roots of grass, under rubbish, in moss, &c., in damp places ; sometimes under 

 stones or in damp and decaying wood; it rarely occurs in dung; as a rule common 

 and widely distributed in England and Wales, but not so common further north ; 

 Scotland, local, Lowlands, Forth aud Solway districts ; Ireland, near Dublin. 



The shape of the thorax, if viewed sideways, will at once distinguish 

 this species. 



C> hEemorrhoidalis, Herbst. (impressus, Sturm). Short oval, 

 thickly and finely punctured ; head and thorax shining black, the latter 

 with sides rounded and more narrowed in front than in the preceding 

 species, with a very short but distinct longitudinal impression at base 

 just in front of scutellura ; this impression is often present, but less dis- 

 tinct in the preceding and following species ; elytra somewhat depressed 

 on disc, black toAvards base and thence gradually reddish to apex, the 

 colour being suffused and not distinctly marked off; strire punctured, 

 the fourth straight, interstices wide, finely punctured ; legs brownish, 

 femora darker. L, 2i-?>\ mm. 



In dung, ic ; common and widely distributed throughout the kingdom. 



C. obsoletus, Gyll. (lur/uhris, 01.). The largest of our species ; 

 oval, as broad in front as behind, thickly and finely punctured, shining 

 black with the apex of elytra reddish ; thorax convex, with sides 

 rounded and margined ; elytra a little broader than thorax, ratlier 

 depressed on disc, with fine punctured strise ; legs reddish brown, tarsi 

 usually paler ; the fourth stria of the elytra is not straight, and gradually 

 approaches the third, so that the fourth interstice is narrowed for part of 

 its length ; the interstices are distinctly punctured. L. 3-4 mm. 



In dunff, &c. ; local, and as a rule not common; Loudon district, generally distri- 

 buted ; Hastings; Birmingham; Burton-on-Trent ; Swansea; Northumberland dis- 

 trict, rare ; Scotland, scarce, Lowlands, Tweed, Forth, and Solway districts ; Ireland, 

 near Waterford (Power) and Dublin. 



C. aquaticus, Muls. Oval, not very -convex, thickly punctured ; 

 head shining black ; thorax black \vith margins reddish ; elytra a little 

 broader than thorax with fine punctured stride, which become feebler 



