Ilij/Jncna.] inuRoriuLiu.t;. 249 



small specimens of which it is often confounded, hut it is a smaller 

 species ; the colour is darker, and the extremity of the last joint of 

 the palpi is often, but not always, blackish ; the elytra arc rather short 

 oval with the sides rounded and much more evidently dilated behind 

 llian in the preceding species, and the punctures are almost round ; the 

 lateral margin of the elytra is prolonged to the shoulder, whereas iu 

 JI. 7ii(jrita it is effaced before it reaches it. L. H-2 mm. 



Usually found in running water, under stones ; local, and not common ; Hii-dbrook 

 (Essex); Holm Bush (Brighton); Hastings; Kiiowle (Birmingham) ; Hewdley Forest; 

 Kcpton, ISurton-on-Trcnt ; Llangollen and other Welsh localities; Hartl('i)ool ; North- 

 umberland district ; Scotland, local. Lowlands, Tweed and Forth districts; Ireland, 

 near Watertbrd (Dr. Power). 



H. ang-ustata, Sturm. Eathor elongate, black, or castancous 

 btcnvu ; palpi testaceous, apex usually blackish ; thorax a little broader 

 than long in middle where the sides are somewhat angular", sinuously 

 contracted to base,' with two deep oblique impressions, disc very 

 scantily punctiu'ed, sides rather closely punctured; the lateral impres- 

 sions also of thonix are very distinct; elytra rather parallel-sided, with 

 eight rows of strong, almost square, punctures; legs reddish testaceous. 

 L. U-2 mm. 



Bare ; not found in the Midlands or south of England; Hartlepool ; Northumborland 

 district (The VV'ansbeck, Wallington, &c.) ; Scotland, rare, Lowlands, Tweed, Solway, 

 and Clyde districts (Falkirk, Glasgow, &c.). It was first discovered in Britain by 

 L)r. Power at Blair Bank, Polmont, Glasgow. 



This species is somewhat difficult to determine, but may be dis- 

 tinguished from a. riparia, with which alone it is likely to be confused, 

 liy the distinct impressions of thorax, the sides of which are more 

 sinuate towards base, and by the smaller number of rows of punctures 

 on the disc of elytra, which give the insect a more coarsely punctured 

 general appearance. 



K. gracilis, Germ. One of our most distinct species ; narrow, 

 elciigalc, and ilepressed ; of a shining black or dark castaneous colour 

 with the elytra and margins of thorax often, but iiot always, lighter ; 

 ])alpi reddish testaceous; thorax about as long as broad with the sides 

 dilaifd iu middle in a rounded obtuse angle, rather coarsely punctured, 

 more closely at sides than on disc ; lateral impressions distinct ; elytra 

 long, parallel-sided, hardly broader than thorax, not contracted until a 

 little before apex, with six rows of large and not very closely set 

 ])unctures between the suture and . the humeral angle ; legs reddish 

 testaceous, external margins of femora and tibiae sometimes dusky ; male 

 with the femora slightly thickened antl the posterior tibiiv ciliated on 

 their internal margin. L. 2 mm. 



Local but not uncommon in the ^tidlands and the north of England, but rarer 

 further south, and apparently not found in the London district and the southern conn- 

 ties ; Scotland, common both Lowlands and Highlands. 



U. atricapilla, A^'at. {farips, Sturm, jvu^il/a, Ilcer.). Head 



