252 NEW SPECIES OF AUSTRALIAN COLEOPTERA, II., 



convex, punctures finer and closer; two only of the eight speci- 

 mens have a slight indent at the apex, three have a small fovea 

 at the middle of the base, but all have a considerable depression 

 near the anterior angles, not present in A. laticornis. Elytra are 

 more faintly striate-punctate, the punctures smaller, the striae 

 finer, and the intervals much flatter; the scutellum is less trans- 

 verse. Legs of a lighter colour ; anterior tibiae less thickened at 

 apex, with much finer seriation on outside edge. Beneath, 

 entirely castaneous (in A. laticornis it is black) with a different 

 structure to the presternum; that of A. laticornis has a narrow 

 arched keel, the flanks on each side being hollowed out. In A. 

 brunneus this keel is widened out anteriorly, while the flanks are 

 very slightly concave. The longitudinal rugosity on the first 

 two segments of the abdomen is much finer and closer. Dimen- 

 sions 8x3 mm. 



Hab. — Blue Mountains and Sydney (H. J. Carter). 



I do not think that the colour is due to immaturity, having 

 taken this insect persistently of the same colour, at widely 

 different seasons of the year, in the Blue Mountains, both at 

 Kurrajong and Medlow. 



Acthosus minutus, n.sp. 



Oblong-ovate, parallel, dark copper-brown, shining. Legs and 

 antennae light castaneous. 



Head small, finely punctate and imbedded in the thorax up to 

 the eyes, which are large. Antennae broad, especially the four 

 last joints. Prothorax convex, densely punctate, base and apex 

 truncate, rather sinuate anteriorly, closely fitting the elytra at 

 base. Elytra punctate-striate, punctures very minute, intervals 

 quite flat. Abdomen black, shiny and punctate. Femora and 

 tibiae wide, hind tibiae curved. Dimensions 2*8 mm. long. 



Hab.— Booyong, Richmond River (Mr. R. Helms). 



I am indebted to Mr. Helms for the possession of four speci- 

 mens of this insect, whose minute size alone distinguishes it from 

 -an)' of its allies. I can see few structural differences between 



