458 STUDIES IN AUSTRALIAN ENTOMOLOGY, xvii., 



rugulose towards base; sides lightly rounded, straightened before 

 base, finely bordered; base truncate; lateral basal impressions 

 elongate; lateral basal spaces flat; posterior marginal puncture 

 just within basal angle Elytra narrow, truncate-oval (4 x 2*4 

 mm.); apex lightly sinuate on each side; striae narrow; interstices 

 depressed, fifth, sixth, and seventh a little convex at their apices, 

 second, fourth, and sixth wider than the others, eighth wider 

 than seventh and ninth on basal half, ninth seriate-punctate 

 along eighth stria, and defined by a distinct ninth stria exter 

 nally ; basal border a little raised at humeral angles ; lateral 

 border and channel narrow. Length, 7; breadth, 2'4mm. 



llah. — Victoria : Warburton. Several specimens occurred to 

 me near the Yeathan Creek at Warburton, on the Upper Yarra. 



A very distinct species, at once distinguishable from all others 

 by its small size; ajiieous colour; strongly shagreened, unequal, 

 depressed interstices of elytra, and foveiform punctures of third 

 interstice interrupting the interstice. 



G A s T li G M u s, n.gen. 



Head convex, front obsoletely biirapressed. Labrum truncate. 

 Palpi slender. Mentum : sinus oblique on sides; median tooth 

 wide, short, emarginate. Prothorax subquadrate, rounded on 

 sides; basal angles rectangular; a deep, biimpressed, punctate 

 fovea on each side of base; two marginal setigerous punctures on 

 each side, posterior at basal angle. Elytra convex, bordered at 

 base, striate; scutellar stride at base of first interstice elongate; 

 third interstice 3-punctate near third stria; lateral border inter- 

 rupted, and with inner plica apparent before apex. Meta- 

 sternuin punctate on each side; episterna longer than broad, 

 punctate. Ventral segments 1-3 punctate, 4-6 transversely sulcate. 

 Fennora wide ; intermediate tibiae bent inwards, thickened at 

 apex; posterior trochanters very long, apex obtuse, and not ap- 

 plied closely to femora. Anterior tarsi in ^ lightly dilatate and 

 biseriately squaraulose beneath. 



Belongs to the central body of the tribe Pterostichini, but 

 thoroughly distinct from all other Australian genera. The sulcate 

 ventral segments place it beside Simodontus; from which, it is 



