BY EUSTACE W. FERGUSON. 55 



ACANTHOLOPHUS SIMULATOR Ferg. 



Ferguson, Trans. Roy. Soc. S. Aust., .xxxix., 1915, p. 71. 



I am very doubtful whether thi.s speeies should be regarded as more than a 

 variety of A. tribulus Macl. The supraorbital crests are, however, stouter, and 

 the tulxn'cle on the external rostral margins longer and more acute; the pro- 

 thorax has the first tubercle of the submedian row more elongate, projecting far- 

 ther over the head; the lateral tubercles are shorter and stouter. The elytral 

 granules <nre also more distinct. 



Bah. — South Australia: Kangaroo Island, Lucindale. 



ACAXTHOLOPHUS MASTERSI Macl. 



Maeleay, Trans. Ent. Soc. N.S. Wales, i., 1866, p. 327; A. poxticalis, Macl., loc. 

 cit., ]). 327. 



c?. Comparatively narrow, elongate, strongly convex. Somewhat spareely 

 covered with coppery brown. suhs(|uamose clothing, more densely vittate with 

 white, a central vitta extending from head to about middle of elytra, a second 

 between lirst and second rows of tubercles on apical half of elytra, a third be- 

 tween second and third rows at base; sides albo-vittate along middle of prothorax 

 and lower border of elytra, with some macules above on the elytra; sternal seg- 

 ments with depressed white subsquamose clothing, thickest at the sides. 



Head comparatively narrow, convex, rather feebly impressed in front, with a 

 deeper fovea anteriorly; intercristal ridge low. hardly traceable, supraorbital 

 crests rather closely set, single, acute, spiuifurm, without .nny outward divergence; 

 eyes closer together and nearer front of head than usual. Rostrum shallowly ex- 

 cavate, external ridges hardly raised, somewhat convergent to base; median line 

 lightly impressed; internal ridges low; basal foveae small, rather shallow. An- 

 tennae long and slender; funicle with second joint evidently longer than first; 

 club pedunculate. Prothorax little pi-oduced above, with ocular lobes barely 

 traceable; submedian tubercles ei^ect, conical or spiniform, set in single' series, the 

 median ones somewhat lai-ger than the others; lateral margins with an acute, 

 slender, rather strongly recurved spine in front of middle, with a small conical 

 tubercle at base anteriorly, postero-lateral tubercle small, obtuse. Elytra strongly 

 declivous, and with lateral margins gi-eatly convergent at base, but without any 

 humeral angulation ; punctures shallow, and granules almost obsolescent ; witli 

 three rows of strong spinifonn tubercles; first row with 6, all acute spines, but 

 middle ones rather smaller than the othei-s, the apical spine long and acute ; 

 second row with 4 isolated, strong, acute spines; third row with 2, somewhat 

 smaller but acute, and with a small tubercle anteriorly. Venter with punctures 

 indistinct, with scattered, decumbent, white setae, condensed at sides to form a 

 series of spots. Legs simple. 



?. {A. posticalis Macl.). Larger, with much broader and more convex 

 elytra; more densely clothe<l with mingled grey and brown, rather feebly variegate 

 with white; median line and base of el^'tra with a whitish vitta. 



Head, rostrum and prothorax as in c?. Elytra ovate, very strongly convex; 

 strongly declivous at base, with shoulders rounded off; apex rather strongly nni- 

 cronate; tuliercles much smaller and more numerous than in c?; first row with 10, 

 the basal <ine fairly large, the othei's small and obtuse, liecoraing lai'ger pos- 

 teriorly, the apical one spiniform, though smaller than in c?; second row with 8, 



