382 STUDIES IN AUSTRALIAN ENTOMOLOGY, XV[., 



Hab. — Ceatral Australia(Coll. Sloane). Given to me by Mr. 

 C. French, who sent me also a second specimen, 15 mm. in length, 

 ticketed Esperance Bay. 



A distinct species, showing more resemblance to Gn. insignitus 

 Macl.j than to any other described species, but diflfering con- 

 spicuously by larger prothorax with lateral sulci, and without a 

 channel along base; anterior tibiae 4-dentate; posterior femora 

 and coxEe with numerous setigerous punctures, etc. 



Genus B r i t h y s t e r n u m . 

 Brithysternum macleayi, n.sp. 



(J. Elongate, robust, lajvigate. Elytra widely rounded at apex, 

 lateral margins with a wide triangular explanate process on each 

 side about posterior third; intercoxal part of prosternum pro- 

 duced backwards in a long process excised at apex; intermediate 

 femora armed a little before apex on lower side with a long 

 stout slightly hooked spur; anterior tibise with a thick obtuse 

 triangular prominence on lower side a little above middle. Black, 

 nitid. 



Head large, convex; eyes small, not inclosed at base; subocular 

 ridge well developed; clypeus bipunctate on each side, anterior 

 margin truncate. Labrum emarginate, anterior angles rounded. 

 Labial palpi stout; penultimate joint short with four or five setse 

 on anterior margin; apical joint a little longer than penultimate, 

 thick, a little compressed, truncate. Prothorax a little longer 

 than broad(9-5 X 9 mm.), subdepressed on disc, widest before 

 middle, lightly narrowed to base; apex truncate (hardly emargi- 

 nate); anterior angles very little advanced, obtuse; base truncate, 

 not bordered, except near each side; basal angles rectangular, 

 obtuse at summit; lateral lioider narrow, hardly wider at anterior 

 angles, subsinuate (but not wider) near base; lateral channel 

 narrow with four or live punctures along its course; median line 

 distinct; a well-marked transverse impression a little before base, 

 Elytra oval(17'5 x 8-6mm.), convex, declivous to peduncle; lateral 

 declivities abruptly rounded; ajiex strongly declivous; sides with 



