Australian and Tasmanian 3Ialacodermidae. 215 



in colours, are very easily separated by the sculpture of the 

 head. 



With the exception of 'bracTiypterus, impressifrons and 

 carinaticeps* which are commented upon below, the males f 

 of all the described species may be tabulated as follows : — 



A. Prothorax strongly notched in front 

 AA. Prothorax spinose in front .... 

 AAA. Prothorax entire at apex, or at most 

 feebly bilobed. 

 B. Basal joints of antennae distorted . . 

 BB. Basal joints not distorted. 



C. Elytra very distinctly punctured . 

 CC. Elytra indistinctly or not at all 

 punctured. 

 D. Prothorax partly or entirely dark. 

 a. Head not largely excavated. 

 T), Head partly pale and dis- 

 tinctly punctured . . . 

 66. Head entirely dark and im- 



punctate 



aa. Head largely excavated, 

 c. Elytra partly pale .... 

 CC. Elytra entirely dark. 

 d. Prothorax raised in middle 

 of apex. 

 e. Prothorax pale and 

 strongly punctured on 

 apical sides .... 

 ee. Prothorax entirely dark 

 and without distinct 

 punctures .... 

 dd. Prothorax not raised in 

 middle of apex. 

 /. Head with excavations 

 transversely connected. 

 g. Head when seen from 

 behind with a thin 

 solitary tubercle . 



incisicollis, n. sp. 

 spinicollis, n. sp. 



foveicornis, n. sp. 

 jnmctijjennis, n. sp. 



obliquiceps, n. sp. 

 gagatinus, Lea. 

 marginieoUis, Lea. 



ritficornis, Lea. 



cancd'icidatus, Lea. 



parcdlelus, Lea. 



* And punctilohus and bacchanalis, which were described after the 

 table was drawn up. 



t I have not ventured to include any of the females in the table, 

 although some of them are sufficiently distinct. 



