BY ARTHUR M. LEA. 481 



and with it, I associate Poropterus musculus and some other 

 species. Mr. Pascoe regarded Exithins as allied to Chcetectetorus, 

 but, for various reasons,! he appears, in this, to have been in 

 error. All the species have the derm of an opaque black or 

 piceous-black, with the antennae and tarsi of a more or less dingy 

 red. 



All the known species occur either in Tasmania, or in moun- 

 tainous parts of the mainland; and they are to be found under 

 bark (usually of dead trees), or crawling over logs and fences 

 after sunset. 



A. Head with forehead trisinuate. 



a. Prothorax dilated towards and widest close to apex. .... cariosus. 

 aa. Prothorax rounded in front. 

 b. Shoulders strongly projecting. 



c. Elytra less than twice the length of prothorax ferrugineus. 



cc. Elytra more than twice the length of prothorax... musculus. 



bb. Shoulders rounded. 



d. Prothorax very densely punctate conspiciendus. 



dd. Prothorax with sparse punctures of large size.... sculptilis. 



AA. Head with forehead not trisinuate. 



B. Mesosternal receptacle not suddenly elevated. 



e. Punctures of head clearly defined inamabilis. 



ee. Punctures of head confused brevis. 



BB. Mesosternal receptacle suddenly elevated. 



C. Largest ely tral fascicles suhapical loculosus. 



CC. Largest ely tral fascicles subbasal. 



D. Prothorax with pale scales along middle simulator. 



DD. Prothorax without pale scales along middle fumatus. 



Exithius cariosus Er.; Mast. Cat., Sp.No.5541. 



Cryptorhynchus cariosus Er.; Exithius capucinus Pasc, I.e., 

 No.5526. 



The shape of the prothorax, well drawn in the figure accom- 

 panying Mr. Pascoe's description of E. capucinus, renders this 

 species remarkably distinct. The large scales are frequently con- 

 densed to form fascicles, at least two of which are always trace- 

 able on the prothorax. The prevailing colour of the scales on the 

 upper surface and flanks is a dingy ochreous-brown ; occasionally 

 there is a triangular patch of whitish scales on the flanks of the 



f These Proceedings, 1909, p.59.3. 

 36 



