372 ON THE CARENIDES (FAM. CARABID.E), No. IV., 



C. habile, SI., (type destroyed), appears to be closely allied to 

 C. smaragdulum, Westw., from which only the colour seems to 

 readily differentiate it. 



C. coruscum, Macl, is unknown to me in nature. Sir William 

 Macleay apparently regarded it as allied to C. elegans, Macl. 



G. splendent, Casteln., is closehy allied to C. elegans, Macl. ; 

 C. cognatum, SI., is a form connecting them. It seems to me 

 probable that with further knowledge these three forms will be 

 united under G. elegans, but more data than I possess are necessary 

 for a confident opinion on the subject. 



C. rufipes, Macl. — I have examined the type of G. rufipes in 

 the collection of the Australian Museum, Sydney ; it is an 

 immature specimen with slender posterior tibire. A specimen 

 from Norseman, S.W. Australia, has been given to me by Mr. C. 

 French, and a comparison with the type of G. rufipes shows it to 

 be that species. This Norseman specimen only seems to differ 

 from C. elegans, Macl., by having the elytra wholly of a steel-blue 

 colour; to me it seems conspecific with C. elegans, but might, 

 perhaps, be regarded as the south-western form of that species 

 and given rank as a variety. 



C. optimum, SI. — This form, from the Murchison District of 

 Western Austi'alia, seems to be the north-western representative 

 of G. elegans, Macl.; further knowledge may show it to be a 

 variety of that species. 



C. speciosum, SI., has thick incrassate posterior tibiae like G. 

 odeivahnii, Casteln., of which species it is the north-western 

 representative, and from which it only seems to differ by its 

 brightly coloured steel-blue elytra. I hardly think it can be 

 maintained as distinct from G. odewahnii. 



Carenum emarginatum, n.sp. 



Oblong-oval, rather depressed, hevigate ; prothorax widely 

 transverse, posterior angles widely reflexed and strongly marked, 

 base lobate; elytra bipunctate posteriorly, emarginate at base, 

 humeral angles strongly marked ; anterior tibiae tridentate. 



