BY THOMAS G. SLOANE. 575 



convex, not prominent, inclosed posteriorly. Mandibles wide 

 and heavy at base, strongly and obliquely declivous to labruni and 

 clypeus, left overlapping right at apex; external edge strongly 

 and roundly angulate about posterior third (thence oblique), 

 arcuate at apex, right more strongly angulate than left at posterior 

 third. Prothorax transverse (IS x 2-7 mm.), convex, declivous 

 on each side between lateral basal impression and posterior angle, 

 widest before middle, lightly narrowed to base; sides rounded, 

 oblique posteriorly ; apex hardly emarginate ; anterior angles 

 obtuse ; base truncate ; posterior angles marked but obtuse ; 

 margins hardly explanate near posterior angles ; border wide; 

 inner basal impression of each side strongly marked, short, a little 

 divergent and attaining border posteriorly; external basal impres- 

 sion hardly marked — if present, shallow and round; median line 

 fine. Elytra wide (4*5 x 3"3 mm.), convex, declivous to base on each 

 side of peduncle, narrowed to base; sides rounded; base truncate; 

 humeral angles strongly marked, hardly dentiform; striole at base 

 of second interstice short (sometimes obsolescent), rising from a 

 punctiform impression. Length 7-8, breadth 3 -3- 3 35 mm. 



Hah. : N. S. Wales — Mulwala (Sloane) ; Victoria — Mallee 

 District (C. French, Junr.). 



This species is characterised b} the peculiar shape of the 

 mandibles ; it is allied by its facies and short metasternal 

 episterna to .S'. fortnumi, Casteln., and S. leai, SI. From 8. 

 fortnumi it can be distinguished by the dentate humeral angles of 

 the elytra, &c.; and from S. leai by its larger size, larger head 

 with less prominent eyes, differently shaped mandibles, front not 

 strongly impressed, elytra not so short and more narrowed to 

 base. From S. ceneipennis (unknown to me in nature) it seems 

 sto differ by having the elytra much more ampliate behind the 

 houlders. For differences from S. Iceviceps, SI., a closel}^ allied 

 species, vide description of that species (p. 576). 



SiMODONTUS L^VICEPS, n.sp. 



Oval, robust, Inevigate ; head wide, convex, without frontal 

 impressions ; prothorax transverse, wider at base than apex ; 



