138 Dr. Sharp's Revision of the 



twice as long as the tenth. Head black and shining-, spar- 

 ingly and indistinctly punctured, much narrower than the 

 thorax. Thorax narrower than the elytra, not (or scarcely) 

 narrowed behind, its breadth about one and a half times 

 its length, finely and pretty closely punctured, with an 

 impression in front of the base in the middle. The elytra 

 are about a third longer than the thorax, coarsely sculp- 

 tured, the sculpture consisting of small granulations, 

 shining in the female, duller in the male. The abdomen 

 is black and shining, segments two to four sparingly 

 punctured, five and six nearly impunctate ; the apical 

 segment in the male distinctly, in the female sparingly 

 and obscurely, granulate. Legs pitchy testaceous, the 

 femora rather darker than the tibiae. 



In the male, the head has a distinct impression in the 

 middle of the upper surface, the impression at the base 

 of the thorax is larger, the granulations of the elytra are 

 much coarser, and more numerous, so as to make the 

 elytra dull. The sixth segment of the abdomen is spar- 

 ingly sprinkled, on the upper side, towards the apex, 

 with granulations; the seventh segment is distinctly 

 granulate, the granulations more numerous and distinct 

 than on the sixth segment, its apex is truncate, and 

 finely crenulate. The under plate of the seventh segment 

 is considerably produced, narrowed towards the apex, 

 the apex itself being a little emarginate. In the female, 

 both the upper and under plates of the seventh segment 

 have the hind margins broad, and rounded. 



Very abundant all over the kingdom, in damp places. 



Ohs. — A variety occurs in which the elytra are of a 

 brownish colour, and the antennee and legs are also of a 

 lighter colour than usual ; it is, perhaps, Thomson's 

 tenuicornis. This colour-variation is to different extents, 

 its extreme form appears very rare. 



Section B. 



Group VI. Head strongly punctured. 



(Species 36—38) . 



The three species of this group are closely allied ; they 

 occur only on the coast, and are easily distinguished 

 from others of the genus. H. vestita (of Group V.) , oc- 

 curring also on the coastj has a similarly punctured 

 head. 



