BY EUSTACE W. FERGUSON". 29 



103 (102) Elytral punctures and granules much less distinct. si-aphirostris Ferg. 



104 (93) Lateral margins of prothorax more irregularly dentate. 



105 (110) Elytral tubercles more or less distinct. 



106 (107) Anterior tibiae simple planicollis Waterh. 



107 (108) Anterior tibiae with subapical notch. 



lOS (109) Supraorbital crests simple denlkoUis Macl. 



109 (108) Supraorbital crests bidentate serralico/lis Macl. 



110 (105) Elytra granulate, not tuberculate. 



111 (114) Form comparatively slender, resembling Acantholoplnis. 



112 (113) Supraorbital crests single: elytral granules duplicated on some of the 



interstices i^raiudatns 'SA. 



113 (112) Supraorbital crests bidentate; elytral granules in single series. 



hhickburni Ferg. 



114 (111 I Form robust, resembling Cubkorrhynchus ; elytral granules m double 



series iiiaximus Macl. 



Geographical Distribution. — The genus has probably as wide a ilistribution as 

 any of the subfamily, with the possible exception of Cubicorrhi/nchut,: It is note- 

 worthy in this conneetion that Acantholophus occurs in Ta-smania, whereas Cuhi- 

 corrJu/nchits ha-s never been recorded from that island. Section II., though few in 

 numbers, ha,s a distribution practically eo-extensive with the genus, though ap- 

 jiarently the soath-west has more species belonging to this section than any other 

 portion. Both the eastern and western sides of the continent are rich in species 

 of Section I. ; but with the difference, that whereas tuberculate forais predominate 

 on the eastern side, spinose species are dominant in the west. The species in- 

 cluded in the dumosus group afford the most striking exception to this generalis- 

 ation; the headquarters of these is in the south-west, but the grouji spreads into 

 South Australia and touches the mallee district of Victoria. Almost the only 

 spinose species in the eastern portion of the continent are two that occur in 

 Queensland. The species of southern Australia mostly fall into the small ade- 

 laidae group. Central Australia, as far north as Tennant's Creek, possesses a 

 few species, and it is noteworthy that these are closely related to foniis occur- 

 ring in north-west Australia, where the genus has been met with as far north as 

 Condon. No species have so far been recorded from the far north. Cuhicorr- 

 liynchus ha.s a similar distribution, but whereas that genus frequents the open 

 plains and inland slopes, Acantholophus appeal's to prefer the mountain ranges. 

 This generalisation is based on my knowledge of the two genera in Eastern Aus- 

 tralia, and I cannot say if the same holds good for other parts. On the east, 

 liowever, the genus is widely distributed along the Main Dividing range and on 

 the sandstone foi-mation of the Sydney basin ; where it occurs farther inland it is, 

 as a general rale, on the spurs and ranges such as the Warrnmbungles, which are 

 offshoots from the main chain. 



Ilftbits. — Specimens are most often taken under logs and stones, or crawling 

 along paths at dusk or in the early morning. At lea.st one species — ^4. marshami 

 — can be taken around Sydney at the base of gra.ss-trees (Xanthorrhoea), and 

 Mr. Clark, of Perth, informs me that other Western Australian species have this 

 habit. I have also received specimens of A. simulator from Mr. A. M. Lea 

 marked as taken in grass-trees. 



Recently, when this manuscript was well nigh complete. I received from Mr. 

 .T. Clark valuable notes on the habits of many of the Western Australian species, 

 which se*m worthy of being recorded in extenso : — "I am quite satisfied that tiie 

 majority of our W.A. Acantholophus feed on the bark of trees, mostly Marri 



