I/lJ>lrtqi<ini..<.] ADKPHAGA. 1S5 



antiTinr and posterior margins brownish, punctured ; base with a 

 depression near posterior anglt's ; elytra rather strongly punctured; 

 breast black ; sexes indistinguishable externally. Long. 2|, lat. H mm. 



Ponds, &c. ; local and not verj' common, altlionorh widely distributed ; London 

 district, Lee, Rei2;ato, Horscll, Woking ; New Forest ; Snowdon ; Askham Bog ; 

 Skiddavv ; Northumherland district; Scotland, not rare, Tay, Dee, Solway, Clyde, 

 Moray ; Ireland, Killarney. 



This is a very distinct little species, which may at once be known' by 

 its reddish colour, smooth upper surface, rather strong punctuation, and 

 small size ; it is usually placed near umhrosus, but bears very little 

 resemblance to that insect, which is smaller, narrower, of darker colour, 

 mucli more evidently pubescent, more finely punctured, and with much 

 longer and more slender antenna? ; the sides of thorax and elytra viewed 

 sideways are continuous, a point which separates it from //. trisfis, with 

 wliich it is sometimes compared ; it is also smaller than that species, 

 dillerently coloured, and has shorter and thicker antennae. 



K. nig-rita, Fab. {ijlahdhis, Thoms.). Oval, rather broad, finely 

 pubescent, sliglitly shining or dull, black or pitch}' ; antennse fuscous 

 with base red, legs red : thorax with margins punctured, disc with a few 

 scattered punctures, almost smooth ; elytra distinctly and rather strongly 

 punctured, punctures obsolete towards apex ; apex of abdomen usually 

 impunctate ; sexes indistinguishable externally. Long. 3, lat. 1| mm. 



Ponds, wells, small streams, <S:c. ; widely distributed and not uncommon tbroughout 

 tbe greater part of tlie country ; Scotland, common in lowland and liigliland disfic-ls 

 as tar nortli as Morayshire ; Ireland, near Belfast and Dublin, and probably widely 

 distributed. 



K. discretus, Fairm. Very like the preceding, of which it has 

 been coTisidered l)y some authors a sexual variety ; the punctuation is 

 much closer and the pubescence less scanty, and the upper surface is 

 l)rig]iter and not finely and densely coriaceous, and therefore dull, as in 

 J[. nirfrifa ; the disc of thorax also is much more evidently puncturetl ; 

 sexual differences very slight. Long. 3, lat. If mm. 



Local ; Lee, Esher, and Birdbrook, Essex (Power) ; Hastings (Butler) ; Xortlmm- 

 bcrland district; Scotland, local, Lowlands, Tay, Solway: this and the preceding 

 si)ecies appear to inhabit clear water either still or running ; Mr. Bold says that a 

 runner from a spring on the moors is a favourite locality. 



This species comes very near the preceding, but the distinctions are 

 very evident if specimens are compared side by side ; it appears to be 

 more closely allied to //. ccrsicns, Wehncke, and //. ii'uf'r, Fairm., than 

 to //. nl(jrita. 



K. pubescens, ( ' yll. {melanocejihal ns, Marsh 1). Oval, rather 

 convex, dull, strongly puliescent, evenly, finely, and thickly piuictured, 

 head and thorax black, elytra fuscous with the shoulders often lighter ; 

 anteniue fuscous with base red, legs ob.scurely red ; last segment of 

 abdonuMi widely and deeply punctured ; anterior tarsi with the third 

 i'liul small. Lo]ig. Si], lat. 1§ mm. 



