UY T. G. SLOANE. 589 



Genus Helluo. 



Bonelli, Mem. Acad. Turin, 1813, (Obs. Ent., Pt. ii., p.23). 



Depressed, apterous. Head large, punctate; neck wide; eyes 

 convex, lightly enclosed at base; postocular part of orbits small, 

 oblique; one supraorbital sensitive seta on each side, f^abrum 

 large, depressed; anterior margin roundly prominent; one sensi- 

 tive seta on each side. Mentum punctate; median tooth tri- 

 angular, short, wide, prominent; lobes long, pointed. Ligula 

 wide, convex; anterior margin rounded. Maxillae with inner 

 lobe not dilatate on middle of inner side ; apex lightly but 

 strongly hooked. Prothorax broader than long, punctate, ampli- 

 ate and rounded at widest part; sides strongly sinuate-angustate 

 to base. Elytra with odd interstices costate. Anterior tarsi 

 wide, hairy; penultimate joint short, deeply circularly emarginate. 

 Type, H. costatus Bon. 



Habits terrestrial. 



An isolated genus belonging to the central group of the Aus- 

 tralian Helluonini. 



The two species may be differentiated as below : — 

 Elytra with even interstices depressed, and closely 



setigeropunctate H. costatus Bon. 



Elytra with even interstices glabrous, and only punc- 

 tate on each side near striae H. insignis SI. 



Helluo costatus Bonelli. 



Mem. Acad. Turin, 1813; Castelnau, Trans. Roy. Soc. Victoria, 

 viii., 1868, 104; Chaudoir, Rev. & Mag. Zool., 1872, 214; Gestro, 

 Ann. Mus. Civ. Genova, vii., 1875, 872 : H. carinatus Chaudoir, 

 Bull. Soc. Tmp. Nat. Mosc, 1848, i., 107. 



Notwithstanding Chaudoir's reclamation in the Revue et 

 Magasin Zoologique, 1872, I follow Castelnau's view that B. 

 carinatus Chaud., is conspecific with H. costatus Bon. It is one 

 of our best known carabs. Length, 20-26 mm. 



Hab. — Eastern Coastal Districts, from Melbourne to Brisbane. 



Helluo insignis Sloane. 

 Proc. Linn. Soc. N. S. Wales, (2), v., 1890, 642. 

 Length 27 mm. 

 ffab, — New South Wales : Walgett, Bourke, and Garah. 



