BY EUSTACE W. FERGUSOX. 49 



5. Resembling 6, but mure robust; crests similar but apices of rami more 

 distinctly separate; elytra similar but broader, with smaller tubercles, the basal 

 ones hardly distinguishable trom the granules, the apical ones smaller and less 

 acute than in the d'. Venter convex, apical segment not its in 6'. Dimensions : 

 c?. 14 X 5 mm.; 5. 15.5 x 6 mm. 



Hab. — South Australia: Adelaide, Mt. Lofty, Kangaroo Island; Victoria: 

 Mt. Evelyn, Bullarook, Maeedon, Ararat. 



1 examined the type of this species when in England, and have a note that 

 it is a large female of the common Adelaide species. 



The type of A. angasi Macl. is a male and agrees with males of .1. (idelaid<ie 

 Waterh. ; the crest on one side, however, is deformed and not l)ilobed. 



On the name label of A. approximatus Macl. in the Madeay Museum are two 

 males; one of these corresponds to South Australian specimens, except that the 

 tubercles of the second row are slightly stronger at ba.se of elytra; the other also 

 has the elytral tubercles, particularly the basal tubercles of the second row 

 stronger than in A. adelaidae; the tubercles number 9, 7 — 8, 4 — 5, and 9, 8. 5 in 

 the two specimens. In view of the variability in respect to size and number of 

 tubercles so common in species of Acantkolophits, I cannot regard these specimens 

 as specifically distinct, and must sink approximatus as a synonym of adelaidae. 



There are before me numerous specimens from Victoria which I cannot separ- 

 ate from South Australian specimens; it may be remarked that Victorian sjjeci- 

 mens have hitherto been regarded as A. approjimatus and South Australian 

 specimens as A- adelaidae. The series exhibits a certain amount of variation; thus 

 specimens from Bullarook and JIacedon differ in having the elytral tubercles 

 noticeably smaller and noduliform, and in the Maoedon specimens the joints of 

 the funicle are distinctly shorter. Specimens from Mt. Evelvn agree in the size 

 of the tubercles with specimens from South Australia. In all of these there are 

 slight differences from South Australian specimens in the lower intercristal ridge, 

 in the slightly more obtuse supraorbital crests, and in the slightly narrower pvo- 

 thorax witli submedian tubercles, especially the penultimate, shorter. Other speci- 

 mens from Mt. Evelyn differ in ha\'ing the rami of the crests comjiletely fused so 

 that the crest appears single. 



Specimens from Ararat are indistinguishable from South Australian sjieci- 

 mens. 



A pair (c?. 9.) from Inglewood. Victoria, collected by ^Ir. .I.E. Dixon, per- 

 haps represent a variety; they differ in having the crests more distinetlv biramate, 

 the anterior branch being short and erect, and the posterior more slender and 

 slightly recurved. 



AC'.WTHOLOPHUS HALJI.4.TURINUS Ferg. 



Ferguson, Trans. Roy. Soc. S. Aust., xxxix., 19] 5, p- 69. 



Though closely allied to A. adelaidae Waterh., the differences in the supra- 

 orbital crests and the wider, noticeably granulate protliorax appear sufficient to 

 warrant the separation of this species. 



Hab. — South Australia: Kangaroo Island. 



ACANTHOLOPHUS ANGUSTICOLLIS Ferg. 



Ferguson, Proc. Roy. Soc. Victoria, xxvii., 1915, p. 259. 

 This species is closely allied to ,-1. adelaidae Waterh., but is of a more elon- 

 gate form, with narrower prothorax and more numerous and more closely placed 



