47G ON CARABID.E PROM WEST AUSTRALIA 



convex, apical curve more widely rounded and less strongly 

 sinuate on each side, the humeral curve of the border more widely 

 rounded, not angulate. 



Tribe BEMBIDIINI. 



Genus Bembidium. 



71. B. JACKSOXiENSB, Guer. ; l.c Sp. 953. Hah. — Pinjarrah, 

 Geraldton and Mullewa (Lea). 



72. B. ERRANS, Blkb.; l.c. Supp Sp. 7575. Hah. — Beverley 

 (Lea). 



Genus Tachys. 



73. T. FROGGATTi, SL, PL.S.N.S.W. 1896, xxi. p. 362. Eah. 

 — Upper Ord and Behn Rivers (Helms). 



74. T. HELMSi, n.sp. 



Robust, oval, convex; prothorax strongly rounded on sides, 

 about as wide at base as at apex; elytra ovate, six inner striae 

 strongly impressed on each elytron, lateral stria and marginal 

 channel strongly impressed, interstice between them convex, 

 recurved stria of apex deeply impressed. Black with faint 

 greenish tinge; elytra bimaculate about posterior third; maculae, 

 legs, antennae and palpi testaceous. 



Head wide, lightly and shortly biimpres.sed; eyes prominent. 

 Prothorax convex, transverse, a little wider than head, widest a 

 little before middle ; sides strongly and roundly narrowed 

 anteriorly, strongly narrowed posteriorly, subsinuate before base; 

 anterior angles obtuse, not marked; basal angles sharp; border 

 narrow; a strong transverse impression across base. Elytra much 

 wider than prothorax, convex; sides rounded; shoulders rounded; 

 striaj simple, first entire, five succeeding ones only impressed on 

 disc (not attaining base); interstices convex. 



Length 3, breadth 1-3 mm. 

 Hal). — Upper Ord River (Helms). 



In facies this species most resembles T. striohitus, Macl. 

 According to the table of species I have given in P.L.S.K.S.W, 



I 



