64 REVISION' OP THE AMTCTEBIDES, vi., 



tlie posterior small, more triangular in shape. Elytra with rather large punctures 

 and evident granules, but structure obscured by the tubercles; sutural interstice 

 without granules ; second with a row o£ erect conical granules, larger posteriorly, 

 not extending down declivity; with three rows of tubercles, flret row with 5 — 6, 

 the ba.sal ones erect, conical, the rest acute and spinifni-m ; second row with 5. 

 all acute, but larger posteriorly and extending further down declivity than first 

 row; humeral tubercle small, acute; third row with 2 large outwardly projecting 

 acute tubercles. Venter nitid; gently transversely convex; with a few scattered 

 setigerous punctures, and a small patch of white squames on each side near apex- 

 Legs simple. 



?. Very similar; second interstice with line of gi'anules ending above de- 

 clivity in a small tubercle; venter more convex. Dimensions: c?. 11 >^ 4 mm.; 

 ?. 11.5 X 4.5 mm. 



.Hab. — Western Australia: King George Sound. 



The position of this species is doubtful, as it is not closely allied to any 

 known to me. I have placed it among the spinose species.' but the lateral pro- 

 thoracic tubercles are hardly spiniform; at the same time it is not at home among 

 the species comprising the tuberculate group. In general appearance it is not 

 Tinlike a species of Hyhorrhynchus. 



ArANTiioi.OPurs tribulus Macl. 



Macleay, Trans. Ent. Soc. N.S. Wales, i.. 18G6. p- 330. 



c?. Small, elongate. Densely clothed with short brown subpubescence, the 

 prothorax and base of elytra albo-vittate along middle line, and elytra maculate 

 with white; sides of prothorax with rather .sparse white clothing, and inferior 

 border of elytra albo-vittate. 



Head concave in front; intercristal ridge distinct; supraorbital crests bira- 

 mate, the ajiterior branch projecting forwards with apex upturned, the posterior 

 curved upwards with inclination backwards. Rostnim short, widely concave 

 above; external margins with a short, conical tubercle in middle; internal ridges 

 T\ell marked, oblifiue, strongly convergent. Antennae slender, funi.dc with second 

 joint slightly longer than first; club elongate, hardly peduncidate. Prothorax 

 with median line impressed in posterior two-thirds; submedian tubei<'les moder- 

 ately large obtuse nodules, not in single series, the third more outwardly placed, 

 and a small nodule present external to the fourth; lateral tubercles subcylindrical. 

 the median the largest, slightly recurved at apex. Elytra with rather obscure, 

 somewhat transvei'se punctures; granules moderately distinct; with three rows of 

 tuben-les, the first row with 10. the basal ones small and nodulifonn, the others 

 conical, becoming larger posteriorly; second row with 0, all conical, longer and 

 more acute posteriorly, ending on a level with first row; humeral angles with 

 moderately large conical tubercle; third row with 5 — 6 tubercles, conical, becom- 

 ing smaller posteriorly. Venter flat, nitid. with rather long, scattered decumbent 

 setae, mainly light-coloured. Legs sinii>le. Dimensions: c?. 12 X 4.5 mm. 



Hab — South Australia: Port Lincoln. 



The al)ove description is taken from the specimen in the Macleay Museum, 

 but this may not be the type. 



T have placed this and the following species among the spinose species, but 

 they have no near relation to the other spinose species, and in general appear- 

 ance more nearly resemble A. adelaidae. 



