574 STUDIES IN AUSTRALIAN ENTOMOLOGY, NO. IX., 



convexity as eyes. Prothorax hardly broader than long 

 (2-5 X 2-7 mm.), depressed, widest before middle; sides subparallel 

 in middle, lightly rounded to anterior angles, more gradually 

 narrowed posteriorly; apex widely emarginate; anterior angles 

 widely obtuse; base lightly emarginate in middle; posterior angles 

 roundly obtuse ; lateral border wide ; inner basal impression of 

 each side well marked, lightly di^■ergent; external impression 

 wide, bearing near each posterior angle a setigerous puncture;, 

 median line lightly impressed. Elytra considerably wider than 

 prothorax (-D-G x 3 4 mm.); sides lightly rounded; base truncate; 

 humeral angles raised, subdentate; apex wide, shortly rounded; 

 lateral border wide; interstices depressed, third punctate along 

 course of third stria,* ninth seriate-punctate; striole at base of 

 second interstice short, oblique, rising froui a punctiform impres- 

 sion. Length 97, breadth 3"4 mm. 



Hah.: Victoria — Gellibrand River, 30 miles west from C. Otway 

 (Sloane). 



This species seems to lead towards the genus Prosopogimis. It 

 differs from ^\ homomelanus, Germ., by its head still larger, eyes 

 more prominent; prothorax wdder at apex, posterior angles more 

 obtuse; elytra wider, more rounded on sides; episterna of meta- 

 sternum shorter and wider. 



SiMODONTUS MANDIBULARIS, n.Sp. 



Oval, robust, Ifevigate ; head large, mandibles thick and 

 heavy, angulate on external edge; prothorax ti'ansverse, a little 

 narrowed posteriorly, a little wider at base than apex; elytra 

 truncate-cordate, convex, lightly striate, third interstice tripunc- 

 tate along third stria, humeral angle subdentiform; episterna of 

 metasternum subquadrate. Reddish-piceous-brown ; legs and 

 anteniije testaceous-piceous, femoi'a paler. 



Head wide, convex, ampliate behind base of mandibles; front 

 with an obsolete round impression containing a fine puncture 

 behind each angle of clypeus; clypeal suture well marked; eyes 



* There are four punctures, all placed along the coarse of the third stria^ 

 on the left elytron of the specimen before me. 



