730 NOTES ON AUSTRALIAN COLEOPTERA, 



insect with the external basal sulcus of the [U'othorax almost 

 obliterated, and its size is much larger ; in j^uella the prothorax is 

 said to be cordate ; in misera, Chaud., the prothorax is said to be 

 longer than in Impleura with the external basal sulcus " obsole- 

 tior," and it is implied that the hind angles are dentate ; angustu- 

 lus, Macl., seems from the measurements and name to be a much 

 narrower species (though I regard its identity as j^ossiblej ;. lim- 

 batus, Macl., appears to be much smaller and very differently 

 coloured. 



N. Territory of S. Australia ; taken by Dr. Bovill. 



Rhytisternus limbatus, Macl. 



Last year I met with a single example of a Rhytisernus, in the 

 neighbourhood of Lake Eyre, which agrees so well with the 

 description of this remarkable insect that I can hardly doubt its 

 identity, although the type was found at King's Sound, in N.W. 

 tropical Australia. The only discrepancy I notice is in the colour of 

 the antennae which is described as "piceous," whereas the antennae 

 in my specimen are of a brownish testaceous colour. The pro- 

 thorax scarcely differs in any respect from that of the preceding 

 species (^i2. Bovilli, Blackb.) except in having the two basal furrows 

 near the external margin on either side placed in a common 

 impression as in R. liopleura ; the circular form (from some points 

 of view) of the outer of these (referred to by Sir W. Macleay) 

 seems to be characteristic of the species. The elytra compared 

 with those of R. lio2)leura are more strongly striated and have 

 the humeral angles sharper, — more dentiform, — but not the 

 shoulders more produced. 



Leptopodus, Chaud. 



This genus — proposed by the Baron de Chaudoir for Ptero- 

 stichus holomelanus, Germ., — has not been characterised so far as 

 I can ascertain. The following characters will, however, suffice 

 to distinguish it from other Feronice : — Basal joint of antennae 

 not carinate, 3rd interstice of elytra tripunctate, metathoracic 



