104 Dr. Sharp's Bevision of the 



towards tlie apex^ each joint with the length very dis- 

 tinctly greater than the breadth ; joint three a little 

 shorter than two ; four about half as long as two ; fi^e 

 half as long again as four ; five to eleven differing but 

 little in length and breadth, the eleventh being only a 

 little longer than the tenth. Palpi and mouth yellow. 

 Head scarcely narrower than the thorax, slightly nar- 

 rowed in front, with a distinct channel, closely and very 

 finely punctured. Thorax a little narrower than the 

 elytra, its length almost as great as its width, gently 

 narrowed behind, closely and finely punctured, with a 

 distinct longitudinal channel. Elytra fuscous, paler to- 

 wards the apex, about one-third longer than the thorax, 

 closely and very finely punctured. Abdomen blackish, 

 with the extremity yellowish, its punctuation not so fine 

 and dense as that of the thorax and elytra, but the seg- 

 ments above are finely and pretty closely punctured, the 

 punctuation on the sixth segment being a little more 

 sparing than on the others. Legs testaceous, with the 

 tarsi comparatively short and stout. 



In the male, the joints of the antennae are a little 

 longer than in the female ; and the ventral plate of the 

 seventh segment of the abdomen is very much produced, 

 it is also very broad, and not narrowed towards the apex, 

 which is truncate, with the apical angles rounded. 



This species is allied to H. fragilis, but is lighter in 

 colour, with longer joints to the antennge, the head a 

 little broader behind the eyes, &c. It is the fragilicornis 

 of Mr. Waterhouse's catalogue, but I cannot make up 

 my mind that it agrees sufficiently with Kraatz's descrip- 

 tion of that species. 



On the banks of the Scotch rivers, but very rare. 

 Found at Peebles, the Nith at Thornhill and Dumfries, 

 the Almond near Edinburgh. 



9 . Horn a lota fragilis . 



Depressa, nigra, confertim subtilissime punctata, an- 

 tennis elytrisque fuscis, pedibus testaceis; antennis 

 apicem versus hand incrassatis, capite fere quadrate, 

 foveolato; thorace subquadrato, elytris paulo angustiore, 

 leviter canaliculate ; elytris hoc tertia parte longioribus ; 

 abdomine supra segmentis 5 anterioribus crebre subtiliter 

 punctatis, sexto sparsius punctate. Long. 1 lin. 



