BY AVILLIAM MACLEAY, F.L.S., &C. 523- 



9. PtEROHEL^US RIVERINiE, n. Sp. 



A species remarkably like P. Walkeri, but smaller, the clypeal 

 suture more distinctly mai-ked, the lateral angles of the head round 

 and nearly flat, the eyes more apart, the thorax slightly less 

 transverse, and the elytra more convex, more nitid and more 

 strongly costate. 



Long. 10 lines, lat. 6^ lines. 



Hab. — Murrumbidgee. 



In form and stature like F. Walkeri. 



10. Pterohel^us spinicollis, n. sp. 



Broadly ovate, black, moderately nitid. Head sub-opaque, very 

 minutely punctate, the surface flat, the angles scarcely reflexed. 

 Thorax also sub-opaque, very minutely punctate, transverse, very 

 largely emarginate in front, the anterior angles advanced and spini- 

 form, the margins very broad and smooth. Scutellum transverse, 

 curvilinearly triangular, somewhat depressed at the base. Elytra 

 each with 17 rows of strong punctures, the interstices for the 

 most part slightly elevated, the fourth and eighth distinctly so, 

 the margins broad, flat and smooth, and the sutural apex termi- 

 nating in a dehiscsnt spine. 



Long. 10 lines, lat. 8 lines. 



Mab. — Endeavour River. 



11. PtEROHEL^US ACUTICOLLIS, n. sp. 



This species differs from P. sjnnicollis in being of less size, in 

 having the anterior angles of the thorax acutely advanced but not 

 si)inigerous, and in the elytra not mucronate. The form and 

 sculpture is in every i-espect the same. 



Long. 8 lines, lat. 6 lines. 



Ilab. — Endeavour River. 



