480 ON CARABID.K FROM WEST AUSTRALIA, 



deeply impressed; interstices convex, carinate near apex; border 

 narrow. Mesosternal episterna punctate. Metasternum on sides, 

 and episterna strongly punctate. Ventral segments punctulate on 

 sides, the punctures obsolete on apical segments. 



Length 7-3-10, breadth 2 -5-3 -2 mm. 



/fab. — Upper Ord and Behn Rivers (Helms). 



The difference in facias and the absence of an iridescent tinge 

 differentiate this species from L. iridescnn, Casteln., and its 

 allies ; among the species known to me it most resembles L. 

 atronitens, Macl., from which it differs by being more elongate 

 (especially the elytra) and by the absence of any puncturation 

 at the sides of the prothorax near the base, &c. It is winged; 

 the base of the prothorax is just a shade narrower than the apex. 



Genus Simodontus. 



The study of the genus Simodontus has been rendered 

 extremely difficult by the uselessness of Baron Chaudoir's descrip- 

 tions of his species; the following note on the species of his first 

 division, viz., those with the metasternal episterna long, may be 

 useful, and should be read in conjunction with the remarks of 

 the Rev. Thos. Blackburn on the genus Simodontus* 



It may be assumed that S. australis, Dej., is a Victorian species 

 found about Melbourne, and that Argutor antipodus, Mots., 

 (described as from the neighbourhood of Melbourne) is synonymous 

 with it. S. convexus, Chaud., is evidently very near S. australis, 

 but doubtless different by its more convex shape, larger head, and 

 less prominent eyes; I believe I have seen it from Victoria. S. 

 tranxfaqa, Chaud., seems to me very likely to be S. murrayensis, 

 Blkb., (rather than S. eloayatus, Chaud., as suggested by Mr. 

 Blackburn); being the only lightly striate species with elongate 

 metasternal episterna known to me. S. ortliomoides, Chaud., and 

 S. elongatus, Chaud., I have not been able to identify, nor do I 

 think I have ever seen either. I have seen the types of Sir 

 William Macleay's Argutor foveipennis, A. nitidipennis and A. 



* P.L.S.N.S.W. 1889 (2), iv. pp. 732-738. 



