231 



triangle with its base on the base of the elytra, but in most 

 examples the piceous colour is more extended (leaving only the 

 hinder part of the lateral margins and the apex testaceous) till in 

 one of my Victorian specimens the whole elytra are of dark 

 colour with only the apex somewhat lighter than the general 

 surface. The most marked character distinguishing this species 

 from the preceding consists in the close punciuration of the 

 flattened portion of its sterna. 



CERCYON. 



Up to the present time ^»vo genuine species of Cercyon have 

 been recorded as Australian, viz., C. fossum, Blackb., and (the 

 doubtless imported) C. flavipes, Fab. I have now to record the 

 following : — 



C. quisquiliinn, Linn. I have an example of a Cercyon (taken 

 to the best of my recollection near Melbourne) which seems to me 

 to be this species. Compared with the specimen in my European 

 collection the elytral interstices certainly seem to be a little less 

 finely punctulate, but I can find no other difference, and have 

 little doubt the insect has been imported into Australia. 



PSEUDOHYDROBius (gen. nov. Palpicorniivm). 



Palpi labiales breves graciles, articulo ultimo ovali quam praecedens 

 sublongiori ; palpi maxillares minus elongati, quam capitis 

 (inter oculos) latitudo vix longiores, articulis ultimis 2 

 longitudine sat ^equalibus ; mentum quadratum ; labrum 

 brevissimum sub clypeo fere abditum ; caput sat parvum ; 

 oculi modici quam Hydrobii minus leviter granulati ; 

 antennae 9-articulat», quam palpi maxillares sesquilongiores^ 

 articulis 1° quam IP* sublongiori subcylindrico, 2° quam 

 1*^* triplo breviori, 3-6 gracilibus gradatim brevioribus (his 

 conjunctis quam P^ 2"* que conjuncti vix brevioribus), 7-9 

 clavam formantibus (7° 8° que inter se sequalibus, his 

 conjunctis quam IP"" paullo longioribus) ; prothorax trans- 

 versus ; scutellum modicum ; elytra ovalia ; pedes modici 

 sat graciles ; femora compressa ; tibiae breviter ciliatse ; 

 tarsi modice elongati, articulis 1° perbrevi, 2° 5° que 

 elongatis inter se sequalibus ; unguiculi simplices ; mesoster- 

 num sequale (i.e., nee carinatum nee tuberculatum) ; corpus 

 glabrum. 



This genus is certainly, I think, allied to Cyclonotum, but it 

 has the tarsi of Hydrohius, nine-jointed antennae, and the 

 mesosternum non-cariuate. Its habits, moreover, associate it 

 with CydonotiLin rather than with the true Hydroi^hilides, 

 Probably M. Lacordaire would have treated it as a distinct tribe 

 of Falincornes. 



