816 AUSTRALIAN COLEOPTERA, WITH DESCRIPTIONS OF NEW SPECIES, 



H. BoviLLi, sp.nov. 



Minus convexa ; sat elongata ; nitida ; nigra ; clypeo labroque 

 antice rufis ; palpis, antennis (in media) et tarsis rufescentibus ; 

 supra subtiliter sat crebre punctulata ; capite prothorace et 

 elytris punctis majoribus seriatim positis (his capillos subtiles 

 ferentibus) instructis; subtus subtiliter crebre punctulata, crebre 

 breviter pubescens. Long. 7^ lines, lat. 3 lines. 



The head is moderately wide (across the eyes about two-thiixls 

 the width of the prothorax) ; the red anterior margin of both 

 clypeus and labrum is very conspicuous ; the puncturation (which 

 covers it and the rest of the upper surface very evenly) is about 

 equally fine with that of the same parts in the European Hydrous 

 caraboiden, L., but is quite evidently less close ; the larger punc- 

 turation is as follows : — a pair of punctures placed transversely in 

 front, and about five placed in a transverse row on either side of 

 the base of the dark part of the clypeus ; and on either side an 

 elongate cluster just within the eye, and another curving in a 

 half circle forward from just in front of the eye. The prothorax 

 is at the base quite twice as wide as it is long down the middle, 

 and about half again as wide as its front margin : its anterior 

 angles are well advanced and rather sharp, its hind angles roundly 

 rectangular, and its lateral margins nearly straight ; the large 

 punctures run in two series on either side obliquely backward 

 from near the front and about the middle of the lateral margin. 

 The elytra are about three and a half times longer than the pro- 

 thorax, truncate at the base, very gently and arcuately contracted 

 hindward, with humeral angles little marked ; the fine lateral 

 margin is continued along the base on either side to the scu- 

 tellum ; the rows of larger punctures run as follows — two rows 

 (very little larger than those of the general surface) near the 

 scutellum on either side, the inner of which in front forks forward 

 into two branches at about twice the distance of the scutellum 

 from the base, and does not reach the apex though both its 

 branches reach the base ; then three rows of punctures about 



