BY THE KEV. T. BLACKBURN. 99 



PALPICORNES. 

 Hydrobaticus tristis, Macl. 

 An examination of the type of this species shows that it differs 

 from H. australis, Blackb., in having the interstices of the elytra 

 evidently convex behind, the alternate interstices slightly more so 

 than the others, and the commencement of the posterior declivity 

 a little marked, not quite evenly continuing the general surface. 



Hydrobaticus luridus, Macl. 



I have inspected the type of this insect and have no doubt of 

 its being a variety of H. tristis. In his description Sir W. Macleay 

 says that it differs from that species only by its smaller size and 

 pale lurid colouring. I have found a very similar variation in H. 

 australis. 



LAMELLICORNES. 



DiPHUCEPHALA SPRETA, sp.nOV. 



Viridis, capite postice prothoraceque aureo-micantibus, antennis 

 (clava picea excepta) pedibusque rufis, tarsis apice picescen- 

 tibus ; pilis supra brevibus fulvis subtus elongatis albidis 

 vestita; clypeo (maris) antice profunde arcuatim exciso, angulis 

 anticis divergentibus ; capite crebre ruguloso ; prothorace 

 crebre fortiter vix profunde punctulato late leviter canali- 

 culato, sulcis transversis sat profundis sulcum dorsalem baud 

 attingentibus, lateribus in medio angiilatis, angulis posticis 

 acute rectis; elytris sat fortiter transversim rugulosis obsolete 

 2-costatis ; tibiis anticis ad apicem extus 2-dentatis. 



[Long. 5, lat. 2i lines. 



A large and handsome species ; the only one yet recorded, I 

 think, from W. Australia with red legs. 



W. Australia ; in the collection of C. French, Esq. 



LiPARETRUS MAURUS, .sp.nOV. 



Ovalis ; minus nitidus ; piceo-niger, antennarum stipite rufo, 

 pedibus picescentibus ; prothoiace (basi excepta) setis erectis 



