104 Mr. F. Bates on New Genera 



stripe of dark bluish green, then a narrower stripe of pm-ple, 

 then a broad stripe of golden green gradually deepening into 

 the dark bronzed green of the rest of the elytra ; reflexed 

 lateral margins metallic purple ; punctuation more regular 

 and less numerous than in T. colunihina ; the punctures 

 distinctly arranged in lines and somewhat close-set ; the in- 

 tervals Avith a row of similar but more distant (about one to 

 three) punctures ; the intervals are also distinctly less rugose 

 than in T. columbina : underside tinged with green ; flanks 

 and sides of abdomen moderately punctured ; legs castaneous ; 

 palpi and antennae paler. 



Length 3| lines. 



Hah. New South Wales. One example. 



Titcena alcyonea^ Erichson. 



Easily to be distinguished from either of the preceding by the 

 body not distinctly pilose. The head and prothorax black, with- 

 out any metallic tinge, very closely and evenly punctured (almost 

 cellulose-punctate) : the elytra more densely punctured ; the 

 larger punctures arranged in lines, with smaller but equally 

 close-set punctures on the intervals ; the intervals are more 

 decidedly (especially near the base) rugose even than in T. 

 columhina^ and are at the apex united and distinctly costiform ; 

 the colour is dark green, with dark purplish reflections, the 

 suture towards the apex being golden green with purplish re- 

 flections ; the lateral reflexed margins are brilliant metallic 

 purple : the epistoma is longer and the antennary orbits much 

 more prominent than in T. pulchra ; in both they are pitchy 

 red : underside piceous ; legs castaneous ; antennae and palpi 

 paler. 



Length 3^-4| lines. 



Hah. Albany, West Australia. Three examples in my 

 collection. 



Var. rvficollis. 



Prothorax dull red ; epipleural fold and underside yellowish. 

 Hah. Albany. One example. 



Artystona, n. g. 



Differs from Titcena in the prosternum less strongly and 

 abruptly elevated between the coxfe, not distinctly concave in 

 front of them, the anterior horizontal portion longer ; the head 

 consequently is less deeply imbedded in the prothorax, and 

 does not repose on the front coxae. Prothorax squarer, less 

 convex, truncated at base and apex, more or less finely 



