188 Dr. Sharp's Revision of the 



thorace transverse, basi impresso ; elytris confertim dis- 

 tinctius granuloso-punctatis ; abdomine segmeBtis 2-4 

 parce punctatis, 5 et 6 fere leevigatis. Long, l^-lf lin. 



Mas; abdomine segmento 7° dorsali apice truncate, 

 et crenulato. 



An obscurely coloured, rather large species, with the 

 anterior parts dullish, the abdomen shining. The an- 

 tennee are moderately long, slender, scarcely thickened 

 towards the apex; black, the basal joints yellowish ; joints 

 two and three rather slender, of about equal length, the 

 third being very little the longer of the two, four shorter and 

 more slender than five, five to ten nearly like one another, 

 each a little narrowed towards its base, each a little longer 

 than broad ; the eleventh joint is rather long and pointed, 

 not quite so long as the two preceding together. The 

 head is narrower than the thorax, blackish, with a rather 

 dull, brassy appearance, finely and indistinctly punctured. 

 The thorax resembles the head in colour, it is narrower 

 than the elytra, about a third broader than long, the sides 

 gently rounded in front, then very slightly narrowed be- 

 hind, very finely and not closely punctured, and with a 

 broad shallow impression in front of the scutellum. Ely- 

 tra about a third longer than the thorax, of a dirty brown- 

 ish or yellowish-brown colour, slightly darker about the 

 scutellum, closely and distinctly punctured, the sculpture 

 consisting of small roughish elevations ; their pubescence 

 is depressed, and pretty distinct. The abdomen is black 

 and shining; segments two to four sparingly but dis- 

 tinctly punctured, five and six almost impunctate. Legs 

 dirty testaceous. 



The male has the apex of the seventh segment of the 

 abdomen above, truncate and crenulate, the crenulations 

 are rather large and about eight in number, the outer 

 one on each side the most distinct. 



In wet places on the banks of the Scotch rivers, among 

 moss, also sparingly in England, 



Ohs. — This species may readily be distinguished from 

 H. xantlioptera, by the darker antennse with shorter 

 apical joint, the obscurely brassy colour of the head and 

 thorax, and the more strongly punctured and obscurely 

 coloured elytra. It may possibly prove identical with 

 Atheta aquatica, Th., but Thomson describes the male of 

 that species as having the hind margin of the seventh 

 segment furnished with four teeth. 



