380 Records of the S.A, Museum 



thorax; on 0. haac/i they are even denser, but are not as large; on 0. nigosm the 

 prothorax is niiicli rougher, Init the roughness is due to irreguhir elevations; on 

 the present species it is due to ])unetures. The medio-frontal elevations of the 

 prothorax are very feeble, especial!}' the two median ones, which appear to be 

 little more than irregular ridges between a few punctures; Hie median line is 

 invisible from above, but from in front the prothorax appears to be vaguely 

 depressed along the middle. Tu some lights, parts of the under-surface have a 

 faint greenish or ]nirplish gloss. 



ONTHOPHAGUS CLYPEALIS sp. nov. 



Plate ix. fig. 78. 



S Black, shining, in parts with a slight bronzy gloss, antenuae, palpi, and 

 tarsi reddish, cluli paler. TTnder-surface, legs, pygidium, sides and apex of 

 prothorax, and parts of head, Avith rusty-red hairs; elytra with a row of shorter 

 and paler subdepressed hairs or setae on each interstice. 



Head moderately large, Avith a rather short, subconieal, and somewhat sloping 

 horn near each eye; between the horus and the clypeal suture distinctlv concave, 

 and with rather small but distinct punctures. Clypeus with fairly numerous 

 sharply defined punctures of moderate size, with larger setiferous ones scattered 

 about ; sides evenly rounded and slightly margined, the margins moderately 

 elevated, becoming more elevated and almost truncated in front ; suture trisinnate, 

 median sinus carinated, arched forwards, and about once and one-third the width 

 of each of the others, Avhich are obliqne. Eyes narrow, with distinct facets. 

 Prothorax rather Avide, front slightly retuse and Avith a feeble median lobe, sides 

 and apex finely margined, base not ; Avith rather sparse, sharply defined pnnc- 

 tures, small in middle, and larger, but not coarse, elscAAdiere ; median line A^aguely 

 defined. Elytra Avith narroAv, geminate striae, containing rather distant, trans- 

 Averse punctures ; interstices Avith irregular roAA^s of fairly large, distant punctures. 

 Metasternum Avith rather large, sharply defined punctures ; near the coxae mixed 

 Avith some smaller ones. Apical segment of abdomen distinctly narroAved to 

 middle ; pygidium Avith rather large and sparse punctures. Length, 7-8 mm. 



9 Dififers in haAnng the interocular horns reduced to slight prominences, 

 connected by a feeble ridge, the concave space shalloAver and Avith coarser punc- 

 tures; clypeus slightly notched in front, AAath denser punctures, its suture more 

 elcA'ated in middle ; prothorax not retuse in front, AA'ithout trace of a feeble median 

 lobe, hairs not continuous across apex, and apical segment of abdomen not 

 narroAved in middle. 



Hah. Northern Territory : Groote Eylandt (N. B. Tindale). Type, I. 15399. 



I knoAv of no closely allied species; the cephalic horns are placed somewhat 



