428 revisional notes on Australian carabid^e, iv., 



N. opacicolli s Chaud., from which it differs by form wider; pro- 

 thorax proportionately wider; elytra wider, more oval, interstices 

 less convex, especially the second, fourth, and sixth, which are wide 

 as far forward as the impressions extend (that is, nearly to the 

 base), apical sinuosities strongly developed. 



33. N. opacicollis Chaud., ( = Orbitus purpureipennis Motsch., 

 and Feronia purpureolimbata Cast. ) is evidently a species which 

 varies considerably, and probably includes several races, or sub- 

 species, some of which will probably be recognised under varietal 

 names, when their geographical areas become clearly known. I 

 offer the following notes : — 



(1). Specimens from Acacia Creek, N.S.W., (six miles south 

 from the Queensland Railway town, Killarney) vary in length 

 from 1 4 to 17 mm. Elytra with a cupreous margin in both sexes, 

 interstices with numerous foveoles on apical third; in <£, of a 

 subseneous-purple; in £, of an obscure purple-black; pronotum 

 sometimes wholly black, sometimes tinged with green near basal 

 angles. 



(2). Specimens from Dorrigo are very similar to those from 

 Acacia Creek in colour, but do not reach so large a size (15-1 55 

 mm.). Foveoles on the elytra fewer in number, and not extend- 

 ing so far forward; prothorax usually proportionately shorter, 

 wider, less sinuate on sides near base, and with basal angles less 

 rectangular. 



(3). A specimen ticketed "Clarence River, Lea," is black, with 

 merely a faint trace of a metallic margin on elytra. It has the 

 prothorax more strongly sinuate before base, with the basal 

 angles still more sharply marked, than the Acacia Creek speci- 

 mens. Length, 15*5 mm. 



(4). Specimens from Dunoon, on the Richmond River, are 

 larger (16-18 mm.); black, the border of the elytra with merely 

 a faint metallic tinge; prothorax wider than in the Acacia Creek 

 specimens. The foveoles of the elytra extend forward beyond 

 the anterior puncture of the third interstice. 



N . rugosicollis SI., now appears to me to be founded on an 

 aberrant form of N. opacicollis Chaud., in which the foveoles of 



