34 STUDIES IN AUSTRALIAN ENTOMOLOGY, 



Elytra o-\aI (12 x 7 mm.), convex, widest behind middle, widely 

 rounded at apex; whole surface punctate; punctures small but 

 deeply impressed on basal half, becoming more and more minute 

 towards apex (obsolete at apex itself); three large punctures in a 

 row on each side of suture, near base ; a row of seven or eight 

 rather strong widely placed punctures about one and one-half 

 millimetre from suture extending to about apical third; two well 

 marked small punctures in a line on apical third behind and a 

 little more distant from suture than the row of seven or eisrht; a 

 submarginal row of widely and unevenly placed punctures extend- 

 ing from shoulders to apex, a row of closely placed fine punctures 

 along margin of sides. Length 21, breadth 7 mm. 



Hah. — Murchison River, West Australia (Coll. French). 



This handsome species is allied to M. cylindrica, Mad, but 

 differs by its broader and less cylindrical shape, by the absence of 

 the foveiform puncturation on the basal part of the elytra, &c. 

 The elytra are wholly of a metallic blue colour with purple reflec- 

 tions in changing light; the puncturation is close and without 

 order ; the punctures are small and impressed in the smooth 

 surface of the elytra (there being no raised interstices or rugosity 

 on any part); they are coarser towards the suture than towards 

 the sides and become very small a little before the middle; behind 

 the apical third they can only be seen with a lens and at the apex 

 itself become obsolete. 



Tetracha excisilatera n.sp. 



Q. Robust, oval, convex. Elytra widely oval, coarsely punc- 

 tate on basal half of disc ; a subsutural row of widely placed 

 punctures on each elytron; inflexed margin with a strong short 

 emargination opposite third ventral segment. Head green, 

 becoming black in middle of upper surface; mentum brown; pro- 

 thorax (including under surface) green, becoming black along 

 middle of up2:)er surface; elytra piceous-black tinged with green 

 on punctate basal part, a yellow margin from humeral angles to 

 apex, this margin triangularly dilatate and reaching about half 

 wav to suture at anterior third; legs, antennte, palpi, labrum, and 

 mandibles (excepting apex) pale testaceous; edge of labrum, teeth 



