BY THOMAS G. SLOANE. 441 



blunted at apex; border well developed and equal on sides, con- 

 tinuous along anterior margin. Elytra wide (3*7 x 3 mm.), con- 

 vex; striae decidedly crenulate, second (counting at base) obsolete 

 on apical declivity, ninth (counting at base) curving inwards 

 near base; interstices lightly convex on disc, more strongly con- 

 vex towards apex, eighth wide, depressed, ninth rugose (the 

 rugosity caused by closely placed, punctiform depressions along 

 inner and outer sides of interstice). Length Q-D, breadth 3 mm. 



Hab. — Victoria: Beech Forest, Otway Ranges (Dixon). Colls. 

 National Museum, Melbourne, Dixon, and Sloane. 



This species was found by Mr. J. E. Dixon, of Melbourne, its 

 discovery adding another genus to the fauna of the mainland of 

 Australia. It is closely allied to the Tasmanian S. leai SI., and 

 has the same elongate second stria on the elytra, which ends at 

 the beginning of the apical declivity. *S'. limbatus differs from S. 

 leai by form less convex, elytra more strongly striate, striae more 

 strongly punctate, lateral interstice catenulate, closely seriate- 

 punctate along outer as well as inner side; testaceous margin 

 narrower, confined on sides to lateral channel, ninth interstice, 

 and outer side of eighth interstice. 



Decogmus, n.gen. 



Head stout, not narrowed behind eyes; one supraorbital seta 

 opposite posterior fourth of eye on each side; eyes convex, not 

 enclosed behind, a littledistant from buccal fissure; gular sutures 

 wide apart. Lahrum truncate, 6-setose. Clypeus truncate; one 

 seta on each side opposite base of mandibles. Mandibles light, 

 elongate, sharply pointed (not strongly hooked); basal articula- 

 tion-point with clypeus hardly concealed (not overlapped) by 

 sides of clypeus. Maxillce with outer lobe 2-jointed; inner lobe 

 dentate (about six, strong, short, narrow teeth equally distant 

 from one another), a few spinous bristles besides the teeth on 

 basal half, apex sharp, lightly hooked. Maxillary palpi rather 

 long; second joint stout; two apical joints narrow, equal, apical 

 joint a little stouter than penultimate joint, truncate. Labial 

 palpi rather long; two apical joints of equal length; penultimate 

 slender, bisetose on inner side; apical joint shaped like a narrow 



