Br EUSTACE W. FERGUSOX. 



65 



Rostrum short, shallowly coiuave above iu front, external margins feebly 

 ang-ulate anteriorly; oblique internal ridg-es united to form a median carina, run- 

 ning up on to intercristal ridge. Head concave behind crests; supraocular crests 

 single, strong, projecting upwards and arched somewhat backwards to apex, the 

 two crests almost joined at base, as viewed from in front, without much outward 

 inclination. Antennae with scape long, slightly curved, moderately stout and of 

 uniform thickness; funicle with first two joints subequal, of moderate length; 

 club not pedunculate. Prothorax (3 >^ 4 mm.) much as in .1. tatei; anterior 

 margin slightly produced above, with moderately distinct ocular lobes; median 

 line deeply impressed; with a row of tubercles on each side of median area, prom- 

 inent, spiuiform, about 6 in number, arranged in single series, the two rows 

 slightly farther apart in middle than at apex or base, apical two tubercles smaller 

 and conjoined at base; lateral mai'gins with a large, acute, outwardly projecting 

 spine, with the apex slightly curved backwards in front of middle, a small con- 

 joined s)iinc at the base of this anteriorly, and a small dentiform tubercle posterior 

 to middle. Elytra (8.5 >< 5 mm.) gently rounded on sides; punctures shallow, 

 obscured by clothing, with rows of little evident granules on the interstices be- 

 tween the three rows of tubercles; first row of tubercles with 12, the basal ones 

 small and mere gTanules, the last 3 — i becoming larger and spiniform, one or two 

 granules present on declivity ; second row with 10, the basal 7 small, but conical, 

 the last 3 — 4 acutely spiniform, reaching a more posterior level than first row ; 

 third row with large humeral and subhumeral spines, the latter the larger; fol- 

 lowed by 3 much smaller spines, the row degenerating into mere granules. Under 

 surface with punctures obscured by clothing, the last segment apparently rugosely 

 punctured. Legs simple. Dimensions : d". 13 X 5 mm. 



Hah. — Western Australia: Onslow. 



Apart from the single crests, this species differs from A. tatei and its varia- 

 tions in its smaller size and smaller elytral tubercles. Two specimens from Onslow 

 and Ashburt.on R.. in the National Museum, may represent a variety: they differ 

 in ha\dng the anterior ramus of the supraorbital crests represented by a short 

 spicule, the crests are also not conjoined at base; the ventral surface is destitute 

 of clothing, and the punctures are obsolete and only rugose at extreme apex. An- 

 other specimen (c?) from Cue, has the anterior ramus present, but arising rather 

 nearer the base, and the crest as a whole rather shorter and stouter; the ventral 

 surface has the apical seginent strongly strigose. 



The material available is not enough to decide whether these specimens repre- 

 sent different species, varieties or merely individual variations. 



A specimen from Middalya, in the National ^luseum, possibly represents a 

 different species. It is a c?, and has the supraorl)ital crests single and conjoined 

 at ba.se, but diffei-s in its darker clothing, maculate with white and in the e\'ideiitly 

 larger eh-tral tubercles. 



ACAXTHOLOPHUS SIMPLEX Pasc. 



Pascoe, .Joum. Linn. Soc, Zool., xii., 1873, p. 7. 



^Yllilc in London the type of this species was examined, and the following 

 notes made. 



<?. Head spines (i.e., supraorbital crests), widely separated at base, single, 

 short, acute, a slight indication of anterior branch right at base. Prothoracic spines 

 small, abraded, granuliform. not in a straight line; lateral spine small, but acute, 

 posterior lateral spine almost obsolete. El^-tra with rows of gi'anules and a few 



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