BY H. J. CARTER. 705 



within extreme border. ScvtelhiDt vejy transverse and impunc 

 tate. Elytra of same width as prothorax at base, and more than 

 twice as long, ovate and convex, shoulders widely obtuse, epi- 

 pleural fold just visible from above, lateral border very narrow, 

 without interior sulcus or evident row of lateral punctures, disc 

 impunctate, surface slightly uneven, with a faint suggestion of 

 longitudinal depressions and convexities; epipleurse smooth, 

 basal segments of abdomen lightly striolate, apical segments 

 minutely-punctate, sides of submentum with a wide, blunt tooth. 

 Tibial without tomentum. Dimensions : 24 xl2mm. 



J/ab. — Ooldea, ISouth Australia. 



A single specimen, probably 9, sent from the South Australian 

 Museum, is nearest to 0. stepheyii Cart., and 0. IcvAa Blackb., in 

 my Table (Ann. Queensland Mus., 1911, p.7). From the former, 

 it is separated by its non-parallel elytra, and fiom both by its 

 strongly acute anterior angles of prothorax (" vix acutis " in 0. 

 l(Pla). It is the largest of the "elongate-ovate" group. Type in 

 the South Australian Museum. 



Note. — Apparently South Australia is the zoo-centre of this 

 and allied genera, which belong to a typically ancient Australian 

 fauna. There is another single specimen of an Onosterrhus sent 

 with the above, from the same locality; but I hesitate to describe 

 it as new, without an opportunity of comparing it with Black- 

 burn's three species, 0. Ubliis, 0. lugiihris, and 0. inconsjncuiis. 



Nyctozoilus parvus, n.sp. 



Ovate, opaque brownish black above, subnitid reddish-brown 

 l)eneath, coxai red; underside clothed with short, thinly scattered 

 pale red hairs, tarsi with thick golden tomentum beneath. 



Head and pronotum densely and evenly punctate, labium 

 emarginate, epistoma truncate in front, then rather abruptly 

 slanting back, the canthus oblique and earlike, extending half- 

 way across the eyes, forehead with medial depression and sepa- 

 rated from epistoma by a curved line; antenna" not extending to 

 base of prothorax, joint 3 very elongate, 4-7 elongate-ovate, 8-10 

 transverse, 1 1 as wide as 10, and half as long again. Prothorax 

 3x -t mm., very little wider at base than at apex, arcuate-emar- 



