BY EUSTACE W. FERGUSOX. 43 



notched above apex : posterior tibiae lightly bisinuate, bent foi-wanls and strongly 

 thickened on underside at apex, the thickened portion composed, at any rate in 

 part, of a closely-set brush of setae; viewed from behind the tibiae sh«w a good 

 deal of inward curvature. Dimensions: c?. 16 X 6 — 17 ^ 7 mm. 



77fli).— N.S. Wales: Mudgee, Portland, Boro. 



This species can be readily recognised by the tibial structure of the male. I 

 believe T have females before me, botli from Boro and Portland; they lack the 

 tibial structure and have the intermediate segments more coarsely punctured and 

 the punctures confluent. Tliey are practically indistingiiishable from the female 

 of A. echidna, and I hesitate to describe them as A. scabrosiis ? on that account; 

 the known habitat of A. echidna does not, however, coincide with that of A. 

 , scabrosus. 



The description of this species has been drawn up from specimens in my 

 own collection. I have, howevei-, examined the types in the Australian "Museum; 

 the male con-esponds with the above description while the female type agrees 

 with the females commented upon above. 



ACAXTHOLOPHUS TRIDENTATUS Macl. 



Macleay, Trans. Ent. Soc. N.S. "Wales, i., 1865, p. 288. 



Allied to A. marshami Kirby, but with supraorbital crests tridentate. Black; 

 lather densely clothed with fine brownish subpubescenee, variegated with grey on 

 elytra. 



d. Head strongly concave in front, with intercristal ridge strongly raised; 

 supraorbital crests large, ti-iramate, the anterior ramus rounded, project- 

 ing forwards and downwards, the median obtusely conical, projecting upwards 

 and forwards and the posterior longer, more acute, extending upwards and back- 

 wards, the intercristal ridge running into the middle ramus. Rostrum rather 

 deeply concave, the external margins angulate, with a short sharp tooth. An- 

 tennae with first two joints of funicle approximately equal; club rather short, 

 stout, not pedunculated. Prothorax comparatively naiTow; submedian tubercles 

 conical, about 7 in number, the median ones exserted. the anterior slightly crista- 

 foi-m; lateral tubercles rather narrowly triangular, the anterior conjoined with 

 median at base only, the median the largest. Elytra with sutirral and second 

 interstices evidently gTanulate. the others more obscurely gi-anulate; with three 

 rows of tubercles, first row with 10 — 11. mostly small, noduliform. but erect, the 

 last two or three larger and acutely tuberculiform ; second row with f>. the basal 4 

 smaller, but erect and spiniform, the apical tubercles larger and acutely conical, 

 reaching a lower level on declivity than first row ; humeral tubercle a small conical 

 gi-anule ; third, row with 4 — 5 acutely conical tubercles, diminishing in size pos- 

 teriorly. Venter nitid. with rather long, light yellowish-brown setae, set in rather 

 fine punctures. Leg's simple. 



?. Similar, but larger and broader; elytral tubercles smaller and more 

 numerous, 11 — 13. 8 — 11, 5 — 6 in number in the different rows; venter convex. 

 Dimensions: c?. 16 X 6 mm.; ?. 16.5 X 7 mm. 



Hah. — Queensland: Cunnamulla, Victoria River. 



There are two males in the Macleay Museum on the name label of this spe- 

 cies. The description of the female is taken from specimens in my own collec- 

 tion from Cunnamulla. given to me by Mr. A. M. Lea. 



The species may be readily recognised among its near congeners by the dis- 

 tinctly tridentate crests. 



