832 AUSTRALIAN COLEOPTERA, WITH DESCRIPTIONS OF NEW SPECIES, 



The species of Berosus described by M. Fairemaire, are all said 

 to have their elytra either " emarginate," or " obtuse " at the 

 apex, with one exception, — B. sticticus, — in which however the 

 front of the head is said to be impunctate ("lisse"). 



Not rare near Port Lincoln. 



B. siMULANS, sp.nov. 



Oblongo-ovatus ; convexus ; supra testaceus ; capite pro- 

 thoracisque macula nigro-seneis, elytris vix fusco-maculatis ; 

 subtus niger, antennis palpis pedibusque testaceis : capite 

 crebre, prothorace sparsius, fortiter punctulatis ; elytris sat fortiter 

 striatis, striis punctis niagnis nee profundis instructis, interstitiis 

 vix convexis fortiter nee crebre punctulatis, apicibus separatim 

 spinoso-acuminatis. Long. 1| line, lat. t line (vix). 



Resembles the preceding, but the head is more, and the pro- 

 thorax less, closely punctured. The punctures in the elytral striae 

 are long and shallow. In the example before me the elytra are 

 separately pointed in the form of a small acute spine, but the 

 value of this character is doubtful, as I find some variety in the 

 form of the apex of the elytra in most species of Berosus of which 

 I have seen numerous specimens. In one specimen of B. Flindersi 

 the apex of one elytron is much more acute than that of the 

 other. The example before me is a male ; it is pinned in such 

 fashion that I cannot bring a strong lens to bear on its ventral 

 segments, but as far as I can see the 5th ventral segment is gently 

 emarginate, the middle of the emargination being thickened, and 

 its sides slightly pointed. The palpi are entirely testaceous, wliile 

 in B. Flindersi they are conspicuously infuscate at the apex. The 

 dark mark on the prothorax is not very sharply defined and occu- 

 pies the hinder half of the disc — but is probably variable. 



In the Adelaide Univei*sity Museum ; taken in fresh water near 

 Rivoli Bay. 



Hydrochus AdelaidjE, sp.nov. 



Sat elongatus ; brunneus, capite pi'othoraceque obscurioribus, 

 palpis (apice excepto) antennis pedibusque testaceis, tarsorum 



