628 STUDIES IN AUSTRALIAN ENTOMOLOGY, NO, XII., 



LOXANDRUS SUBIRIDESCENS, Macl. 



9. Pcecilus suhiridescens, Macl., Trans. Ent. 80c. N.S.W., ii., 

 p. 110, 1873: 9. P. atronitens, Macl., I.e., p. 110: Platynus 

 nitidipennis, Macl., I.e., p. 111. 



I have carefully examined and compared the types in the 

 Australian Museum of Macleay's species given above, and found 

 them all conspecific. P. suhiridescens and P. atronitens are 

 founded on the 9, Platynus nitidipennis on the ^. L. suhiri- 

 descens being the name first in order, I adopt it for the species, 

 at least provisionally, for I believe it will prove synonymous with 

 L. gagatinus, Casteln., from Tasmania; but, not having seen it 

 from Tasmania, cannot feel absolute certainty on this point; the 

 description of L. gagatimis is useless unless one had Tasmanian 

 specimens. 



L. suhiridescens has, from Macleay's types, the prothorax 

 narrowing to the base, free from punctures near the basal angles, 

 these rounded. Length (after Macleay) 4-4^ lines. 



This species is common on the Murray Elver. A specimen {^) 

 from Mulwala, in my collection, which I compared with the type 

 of Platynus nitidipennis, Macl., and found the same, has the 

 dimensions: length 8-3; proth. 2 x 2-3, apex 1-7, base 2-1; el. 

 5 X 3-15 mm. 



It is distinguished readii}" from L. rujilahris, Casteln., b)^ the 

 absence of puncturation on the prothorax at sides of base, and is 

 the species I have called L. iridescent in my descriptions of L. 

 australiensis and L. longiforrtiis. 



LoXANDRUS RUFILABRIS, CaStcln. 



Pcecilus rujilahris, Casteln., Trans. Roy. Soc. Vict. viii. j^. 219, 

 1868. 



I ascribe the name L. rujilahris, Casteln., to a Queensland 

 species sent to me by Mr. F. P. Dodd from Townsville, which 

 seems to agree better with Castelnau's description than any other 

 species I have seen. 



