364 ON THE CARENIDES (FAM. CARAB1DJE), No. IV., 



A. Eeflexed border of elytra extending past 

 humeral angle on to base, narrowly reflexed 

 and not forming a thickened projection at 



shoulder C. brevicolle Group. 



AA. Beflexed border of elytra ending at humeral 

 angle and forming a thickened upturned 

 humeral projection. 

 B. Elytra impunctate. 



C. Anterior tibiae tridentate. 

 d. Prothorax with posterior angles pro- 

 minent and strongly marked C. transversicolle Group. 



dd. Prothorax with posterior angles 



rounded C. Macleayi Group. 



CC. Anterior tibiae bidentate. 



e. Prothorax with posterior angles pro- 

 minent, subrectangular. C. reflexum Group. 



ae. Prothorax with posterior angles 



rounded, not marked. 



/. Prothorax without a basal lobe. .. . C. laevipenne Group. 



,/f. Prothorax with base widely lobate 



in middle, a strong sinuosity on 



each side of lobe, angles of lobe 



prominent C. perplexum Group. 



BB. Elytra bipunctate. 



g. Prothorax with posterior angles promi- 

 nent and strongly marked; the pos- 

 terior marginal punctures placed on 

 the widely reflexed border at posterior 



angles; anterior tibiae pluridentate.... C. rectangulare Group. 

 fig. Prothorax with posterior angles 

 usually rounded; posterior marginal 

 punctures placed in lateral channel 

 at posterior angles. 

 H. Anterior tibiae tridentate. 



i. Head not longitudinally impressed 

 on each side of occiput behind 



eyes C. smaragdulum Group. 



ii. Head with a longitudinal supra- 

 orbital sulcus behind each eye. C. subcyaneum Group. 

 HH. Anterior tibiae bidentate. 

 J. Elytra bipunctate. 



