200 ADEPHAGA. [^IlyhiuS. 



thickened, with obtuse extremity ; male Avith a short keel on the last 

 abdominal segment and no longitudinal wrinkles ; female with this 

 segment broadly but shallowly emarginate, and in the middle a thick 

 short projection. Long. 9^, lat. 4| mm. 



Ponds in bogs, &c. ; local; appears not to occur in the London district ; Askbam 

 Bog and Strensall, Yorkshire ; Lake district ; Northumberland; Scotland, rare. Low- 

 lands, " Paisley, Mr. Young ; " Ireland, near Dublin. 



Z. senescens, Thorns. Yery like the preceding, but with a distinct 

 seneous reiiection ; it cannot, however, be satisfactorily distinguished 

 except by the sexual characters ; the apical ventral segment of tlie 

 male has a very short carina at apex and no distinct longitudinal 

 A\rinkles ; the outer claw on the hind feet is very little shorter than 

 the inner, and has the apex rather sharp ; the apical ventral segment in 

 the female is broadly and shallowly emarginate as in the preceding 

 species, but has in the middle hardly any projection. Long. 8|, lat. 

 4 1 mm. 



Ponds in bogs, mossy pools. &c. ; local, but rather widely distributed ; Wey- 

 bridge; Woking; Esher; St. Faith's, Norwich ; Fen district, Whittlesea Mere, &c. ; 

 Northumberland district, rare (J. Hardy) ; Scotland, scarce, Lowlands and Highlands, 

 Tay, Dee, Sol way; Lxland, near Dublin, and also near Waterford (Power). 



The specimens standing in British collections imder I. angustior 

 must all be referred to this species; the true /. angustior does not 

 appear to have occurred in Britain ; it is larger than I. cenescens and 

 rather broader than /. guttigcr, and the apical segment of the male has 

 a sharply elevated keel, and is wrinkled, with elongate coarse strite. 



COPEXiATUS, Erichson. 



This genus comprises upAvards of one hundred species, which are 

 widely distributed throughout the Avarmer parts of the Avorld ; one 

 species only occurs in Europe, AA'hich has been included by some 

 authors under Agahus. 



C. agrilis, r. {Liopterus agilis, auct. oblo7igus, 111., riijicollis, Schall). 

 Oblong, moderately convex, rather shining, castaneous ; head smooth in 

 front, strongly punctured behind, Avhere it is more or less black ; thorax 

 Avith anterior margin somewhat darker; antenuceand legs clear testaceous 

 red ; upper surface extremely finely reticulate and covered with very 

 short striae ; elytra with Avell marked but irregular rows of large 

 punctures ; breast and abdomen black ; in the male the short striaa on 

 the thorax have a tendency to take the form of punctures, and the front 

 and middle tarsi are dilated. Long. 7|, lat. 3| mm. 



Ponds, &c. ; local, but widely distributed; London district generally; Deal; 

 Hastings ; VValthamstow ; Cambridgeshire Feus ; Lincoln ; Exeter ; Askham Bog, 

 York ; not fourrd in the Northumberland district, and very doubtful as Scotch (the 

 only record being " Raehills, Dumfriesshire, Rev. W. Little," Murraj'sCat.) ; Ireland, 

 near Belfast (Ilaliday). 



