BY THOMAS G. SLOANE. 



257 



17 



gg. Prothorax with sides meeting base without any sinuosity. 

 B. Prothorax but little narrowed to base, much wider across 

 base than apex, 

 y. Form depressed, prothorax suh- j N. poUtnlus. 



obliquely narrowed to base \N. tuhericauda. 



77. Form rather narrow, convex; prothorax with sides 



evenly rounded ^. kosciuskianus. 



BB. Prothorax decidedly narrowed posteriorly, base not, or 

 very little wider than apex, 

 c. Prothorax with basal angles widely obtuse. 

 D. Prothorax with posterior marginal puncture at basal 

 angle on border, or the border interrupting mar- 

 ginal channel to receive it, 

 S. Prothorax with sides narrowed to base in an 

 even curve, basal angles quite rounded off 



A^. rainhoioi. 



8d. Prothorax with sides a little obliquely narrowed 

 to base, basal angles obtuse but marked 



A^. gippsiensis. 



DD. Prothorax with posterior marginal puncture before 

 the basal angle. 

 E. Head large; eyes deeply inclosed at base by 

 greatly developed orbits, not prominent; orbits 



swollen below eyes a^. satrapa. 



EE. Head moderate; eyes not deeply enclosed at base, 

 rather prominent; orbits not unusually 



swollen below eyes a^. arthuH. 



cc. Prothorax with basal angles marked (posterior mar- 

 ginal puncture at basal angle), 

 r. Head large ; border of prothorax ending at basal 

 angles, posterior marginal puncture at basal angle 



but not on border ^V. vmelUri. 



FF. Head not large, prothorax with border extending 

 on to base on each side and dilatate at basal 

 angles to receive posterior marginal puncture. 

 G. Prosternum not bordered along anterior margin. 



e. Colour black N. macoyi. 



ee. Colour cupreous A\ besii. 



GG. Prosternum with narrow continuous border 

 along anterior margin (colour deep black) 

 N. hoicitti. 



