BY WILLIAM MACLEAY, F.L.S., &C. 533 



26. PTEROHELiEUS ALTERNATUS, PaSCOe. 



Ann. Nat. Hist. Ser. 4, Vol. III. p. 284. 



" Rather narrowly oval, black, shining, somewhat depressed ; 

 head finely punctui-ed ; clypeus scarcely emarginate in front, its 

 suture nearly obsolete ; prothorax minutely punctured, a broad 

 shallow fovea on each side at the base, no groove, the expanded 

 margins not recurved ; scutellum curvilinearly triangular ; elytra 

 flattish at the middle and base, finely seriate-punctate, the alter- 

 nate intervals of the rows raised, the fourth, eighth, twelfth, and 

 sixteenth much more so than the others, the expanded margins 

 broad at the base, gradually narrower to the apex ; body beneath 

 and legs black, slightly glossy, tibiae covered with short spinous 

 hairs ; antennae short, not reaching to the end of the prothorax, 

 black " (Pascoe). 



Length, 8 lines 



Hah. — Interior of Australia. 



Unknown to me, apparently resembling the following species. 



27. Pterohel^us depressiusculus, n. sp. 



Oblong-oval, black, sub-nitid, sub-depressed. Head finely punc- 

 tate, dull, clypeus slightly emarginate, clypeal suture distinct at the 

 sides, depressed in the middle, a longitudinal impression on the 

 forehead, eyes distant. Thorax rather dull, minutely punctate, 

 the anterior angles reaching to the eyes, the margins broad and 

 slightly concave, the base slightly bisinuate and profoundly 

 bifoveate, the disk a little convex with the median line visible 

 throughout. Scutellum triangular, the sides slightly rounded. 

 Elytra very slightly broader than the thorax, and rather more than 

 twice the length, nitid, parallel-sided and rounded towards the 

 apex, seriate-punctate ; the punctures disposed in close not very 

 regular rows, and small, except near the sides when they become 

 larger ; the interstices four, eight, twelve, and sixteen, marked 



