377 



Very like H. derbyensis, Macl., in colour, shape, and 

 integument, but differing in some remarkable characters, of 

 which the following are the most striking : — (1) Duplicated 

 margin of elytra ; (2) vertical lateral edge of elytra greatly 

 increasing in width from shoulders to apex; (3) elytral costal 

 almost continuous from base to apex, terminating in promi- 

 nently raised tooth (in all the other bicostate species these 

 costae terminate abruptly or gradually merge into the general 

 surface) ; (4) the pronounced concavity within the lateral mar- 

 gins, and much exaggerated — almost spoon-like — at apex. 

 Type in author's collection. 



HeLjEUS CYCL1FORMIS, II. Sp. 



Very widely ovate, strongly convex; opaque brownish- 

 black ; sparsely clothed above and beneath with squamose 

 clothing of a rusty-red colour. 



Head — Epistoma limited behind by straight impression; 

 surface mostly concealed by derm, scarcely . punctate ; eyes 

 small, transverse, and almost concealed by prothorax ; antennae 

 with joint 3 as long as 4-5-6 combined, apical four joints trans- 

 verse and rounded. Prothorax 6x12 mm., widest at base; 

 anterior processes sharp, grooved above (falcate), not quite 

 meeting in front, sinuate at their junction with the widely- 

 rounded sides, posterior angles very acute and slightly over- 

 lapping the elytra, base bisinuate ; foliate margins wide, flat 

 behind, becoming concave in front, extreme border reflexed 

 and thin (viewed sideways), slightly rounded and continuous 

 with the under-surf ace ; disc finely shagreened and squamose 

 in patches, a thin lightly-raised central carina, obsolete at apex, 

 raised towards the base with a blunt subcorneal erection (in 

 the female specimen more raised and denned than in the male). 

 Scutellum very transverse. Elytra 12 x 14 mm., wider than 

 prothorax at base, convex, shoulders rounded, widest behind 

 middle; surface rough, with shallow setose punctures, bearing 

 short red hairs, a row of large punctures in a lateral sulcus ; 

 explanate margins wide in front, narrowed at apex, extreme 

 border reflexed (viewed sideways), narrowly convex and not 

 continuous with under-surf ace ; bicostate, with two subparallel 

 costae, diverging at but continuous to base, abruptly terminated 

 at the apical declivity, the suture also carinate throughout. 

 Under-surf ace finely shagreened and squamose; presternum 

 finely rugose, not carinate. Hind tibice with short, close hairs ; 

 all tibiae with two long apical spines. Dimensions — 

 16-17 x 13-14 mm. 



J] ah. — Western Australia: Lake Austin (H. W. Brown). 



