386 STUDIES IN AUSTRALIAN ENTOMOLOGY, XVI., 



Hah. — Roebuck Bay District[ColIs. French((J) and Sloane(2)]. 

 Sent by Mr. C. French, who presented me with a specimen, as 

 coming from N. W. Australia, towards Roebuck ^s^y. 



Comparing the ^, it differs from B. macleayi SI., by prothorax 

 narrower, less narrowed to base; the strongly developed pectoral 

 nodes (in B. macleayi there is only a slight protuberance on each 

 side representing the pectoral nodules); intercoxal part of pro- 

 stei'num short, not greatly prolonged; elytra broader, with the 

 lateral processes far less prominent and not triangularly pointed, 

 etc. 



Female specimens of the three species of Brithysternum are 

 before me, and may be tabulated as under : — 



A. Prosternum without pectoral nodes, intercoxal part produced 

 backwards, this backward prolongation narrowed and notched 

 behind. Posterior trochanters cordate. 



B. Prothorax with anterior angles wide, obtuse, prominent. 

 Elytral border not decidedly thickened at posterior third. 

 Posterior trochanters elongate-cordate B. calcaratum Macl. 



BB. Prothorax with anterior angles narrow, subprominent. 

 Elytral border decidedly thickened at posterior third. 



Posterior trochanters short B. macleayi SI. 



AA. Prosternum with a nodule on each side placed a little behind 

 anterior margin in front of coxfe; intercoxal part wide and 

 deeply emarginate behind, its sides parallel. Posterior tro- 

 chanters short, oviform B. nodosum ^\. 



Tribe Harpalini. 



Genus Phorticosomus. 



Phorticosomus zabroides, n.sp. 



$. Elliptical-oval, robust, convex; mandibles longitudinally 

 strigose near inner margin of upper side; prothorax transverse, 

 wider at base(5 mm.) than at apex(3-8 mm.), anterior and basal 

 angles widely obtuse; elytra subparallel on sides, sti'ongly simply 

 striate, base wide with angles rounded, interstices convex, second 

 with a strong elongate striole at base, third impunctate; anterior 

 and intermediate coxa3, prosternum, mesosternum, and meta- 



