BY EUSTACE W. FERGUSON. 73 



acute, the remainder decreasing in size. Venter gently transversely convex; 

 strongly nitid, with few obsolete setigerous punctures, more evident at sides, the 

 extreme apex rather rugosely punctured. Legs simple. 



9 . Wider ; elytra more rounded on sides ; venter more convex. ■Dimensions : 

 c?. 18 X 6 mm. 



Hab. — Western Australia: Stirling Ranges. 



The above description is taken from the Specimen in the Macleay Museum 

 which is a male; the Australian Museum specimens, presumably the types, are 

 females; these were compared with the male some years ago and agree with it 

 except for the usual sexual differences. 



The species was originally described as a Cubicorrhynchus, but Lea removed 

 it to Acantholophiis and it certainly is congeneric with the other species placed 

 in the second section of Acantholophus. 



A. eximius is related most nearly to A. scaphirostris Ferg., but is a larger 

 flatter insect with coarser granules. 



Acantholophus scaphirostris Ferg. 

 Ferguson, Trans. Roy. Soc. S. Aust., xxxix., 1915, p. 73. 



Though' allied to A. eximius Macl., the present species may be distinguished 

 by its smaller size and more convex form. The lateral prothoracie tubercles are 

 more obtuse, and the elytral tubercles smaller, while the elytral punctures and 

 granules are much less distinct, also the venter is not strongly nitid. 



Hab. — Western Australia : Bridgetown . 



Acantholophus granulatus Sloane. 

 Sloane, Trans. Roy. Soc. S. Aust., xvi., 1892, p. 231. 



The type of this species, now in the South Australian Museum, was examined 

 some years ago. The male alone was known to Mr. Sloane; it came from Barrow 

 Range, but the Museum also possessed a female from Everard Range. 



The species is closely allied to A. maximus Macl., and certainly cannot be 

 separated generically. The chief distinctions are in the form of the supraorbital 

 crests and in the lateral tubercles of the prothorax. The crests are not bidentat* 

 above, the two rami being completely fused. The prothorax is flatter and the 

 lateral tubercles are subconical and more) distinct than in the normal form, though 

 some specimens of A. maximus have the lateral tubercles more strongly developed. 

 The elytral gi-anules are duplicated on some of the interstices. 



The female is broader than the male, but otherwise very similar; the crests 

 are, however, very slightly dentate above. 



Acantholophus blackburni Ferg. 



Ferguson, Trans. Roy. Soc. S. Aust., xxxix., 1915, p. 59; A. simplex, Black- 

 burn (nom praeocc). Report Horn Exped., 1896, p. 292. 



This species is closely allied to A. grmmlatus Sloane and A. maximus Macl. 

 Compared with the male of A. granulatus, the present species differs in having 

 the supraorbital crests distinctly bidentate, the posterior dentation being the longer. 

 The prothorax has the gi-anules less evenly distributed and the lateral tubercles 

 blunter; these differences may not, however, be constant, and the elytral gi-anules 



