24 PBOCEEDINGS OF THE NATIONAL MUSEI'M vol. 67 



12. Elytra not paler at apex * polita Westwood. 



( ? fugax Westwood. J 

 Elytra with the apex rufescent. Thorax with the margins not explanate. 



difficilis Blackburn. 

 ( ? polita Westwood.) 



13. Elytra with a marginal series of a few strong punctures near the base. 



* laevigata Castelnau. 

 Elytra minutely punctate 14 



14. Thorax alutaceous. Elytra with disk less densely punctate. 



■■■■ fiigax Westwood. 

 Thorax minutely punctate 15 



15. Elytra more distinctly punctate. Side margins not paler. 



* punctatissima MacLeay. 

 Elytra very finely punctate. Side margins narrowly and abruptly paler. 



* amaroides Newman. 



16. Size larger, not less than S mm 17 



Size smaller, not more than 7 mm 21 



17. Thorax with side margins much wider in front * tasmanica Casteln;ai. 



Thorax with side margins not distinctly wider in front 18 



IS. Thorax with side margins much narrower in front. Elytra very strongly 



striate striata Casteln;ui. 



Thorax with side margins not distinctly narrower in front 19 



19. Thorax and elytra with side margins paler, piceous. Thorax smooth. Ely- 



tra distinctly striate * mastersi Macleay. 



Thorax and elytra with the side margins not paler 20 



20. Form broader. Elytra distinctly striate vicina Castelnan. 



Form narrower, more parallel. Elytra with striate rather indistinct. 



fallax Westwood. 



21. Elytra with striae confined to apical portion * semistriata Castelnau. 



Elytra with striae extending over me<lian poi'tion 22 



22. Form more oblong. Margins of thorax and elytra paler. Size larger, 



7 mm * dubia Castelnau. 



Form more oval. Margins of thorax and elytra not paler. Size smaller. 

 5 mm , * ovalis Castelnau. 



The following species of Silphomorpha are identified in the ma- 

 terial at hand : 



SILPHOMORPHA FROGGATTI MacLeay 



Laura (Lea) (2). — Coll. Amer. Mns. Nat. Hist. 



SILPHOMORPHA STRIATIPENNIS MacLeay 



Port Darwin, Northern Territory (Lea). — Coll. Am#r. Mus. Nat. 

 Hist. 



SILPHOMORPHA DIFFICILIS Blackburn 



Australia, 58,124. — Coll. Notman. 



SILPHOMORPHA STRAITA Castelnau 



New South Wales (Hy Edwards Coll.). — Coll. Amer. Mus. Nat. 

 Hist. 



