424 REVISIONAL NOTES ON AUSTRALIAN CARABIDjE, iv., 



This species is a little smaller than the measurements given by 

 Chaudoirfor N. resplendens Cast., and has not the margin of the 

 elytra "of a beautiful red-gilt tinge," as said by Castelnau ; other- 

 wise it seems to agree better with Chaudoir's note on N .resplendens 

 than any other species I know. No species that I have seen agrees 

 thoroughly with the descriptions of N. resplendens. Judging from 

 Chaudoir's remarks, that the lateral borders of the prothorax and 

 elytra are narrower and less reflexed in N. opulentus than in N. 

 resplendens, it would appear that N. metallicus has these borders 

 too narrow for it to be N. resplendens. 



The excisipennis-group. 



Prothorax strongly rounded to base on sides; basal angles 

 rounded ; posterior marginal puncture distant from basal angle, not 

 on border. Elytra fully striate; basal border not raised above 

 lateral border at humeral angles ; third interstice with two or three 

 setigerous pores, eighth and ninth narrow, convex. First ventral 

 segment bordered on external side, and behind metasternal epis- 

 terna. Intercoxal declivity of prosternum rounded. Tarsi not 

 striolate on upper surface; four posterior with first joint costate 

 externally, costa not spinulose beneath; onychium glabrous beneath. 



The affinity of the excisipennis-group seems towards N. angusti- 

 basis SI., and the position of both these groups in the genus is 

 doubtful. Two species have been described, which may be differen- 

 tiated as under: — 

 Elytra very strongly sinuate on each side of apex; 



prothorax with sides flushed with purple 28. JV. excisipennis SI . 



Elytra not unusually deeply sinuate on each side of 



apex; prothorax black 29. N j oh tistoni SI. 



The angustibasis-group. 

 Prothorax strongly sinuate on sides posteriorly; basal angles 

 strongly marked; posterior marginal puncture distant from basal 

 angle, not on border. Elytra fully striate ; humeral angles dentate ; 

 third interstice with two setigerous pores. First ventral segment 

 bordered on external side, and behind metasternal episterna. Inter- 

 coxal declivity of prosternum rounded. Tarsi not striolate on 

 upper surface; first joint of four posterior costate externally; costa 



