282 



An example from Cape York is very near to this species but 

 differs in the transverse carina of the pronotum being evenly 

 arched. I believe it to be a good species, but more specimens 

 ought to be examined before it is described ; it does not appear 

 to have been described unless it should prove to be a variety of 

 2?icipe7i7iis, Hope. 



0. Erichsoni, Hope. Specimens that I have no doubt represent 

 this species were sent to me froQ\ the Port Essington region by 

 the late Dr. Bovill and there are other examples (from the same 

 place) in the S. Australian Museum. In Masters' Catalogue 

 0. inermis, Macl., is sunk as a synonym of this insect, but that 

 seems to be clearly an error. The specimens before me belong to 

 the same group of Onthopliagi as those referred to above under 

 the name 0. pici2yenms, having a narrow flattened space forming 

 a pseudo-margin at the base of the pronotum. It seems desirable 

 to supplement Hope's brief description with the following par- 

 ticulars : — Clypeus rather strongly and narrowly produced and 

 acuminate in the male (evenly rounded or nearly so, in female) ; 

 puneturation of head none or very faint in male (in female 

 transversely rugose on clypeus, feeble to strong elsewhere) ; eyes 

 fairly wide, their surface smooth non-granulate (though in som& 

 examples underlying facets are visible through the smooth 

 surface) ; clypeal suture carinate, entire ; frontal carina very 

 feeble in male, its ends more developed and— from some points of 

 view — tuberculiform (in female better developed, with a somewhat 

 quadrate projection in the middle) ; pronotum faintly (or scarcely) 

 punctulate, a strong longitudinal sulcus on hind part, retuse in 

 front, retuse front topped in male by a broad flattened anteriorly 

 emarginate process which projects forward and slightly upward 

 (in the female this is much smaller and almost divided into two, 

 and there is a small tubercle at the external limit of the retuse 

 front), sides strongly sinuate both in front of and beliind the 

 middle, front angles subacute, hind angles roundly obtuse ; elytra 

 strongly crenulate-striate, the crenulations tending to be punc- 

 tures, interstices more or less convex and faintly but somewhat 

 closely and not finely punctulate ; pygidium with strong sparse 

 punctures mixed with much finer ones ; metasternum with 

 strong punctures on the sides and hinder part ; front tibiae of 

 male very evidently longer than of female and having a pencil 

 of golden hairs at their inner apex (Long., 4^ — 4J 1.). 

 0. ffoivitti, sp. nov. Latus ; supra glaber ; subtus fulvo-hirtus ; 

 sat nitidus ; niger, tarsis palpis antennisque plus minusve 

 ferrugineis (harum clava testacea) ; clypeo fortissime trans- 

 versim rugato, antice baud vel vix sinuato ; sutura clypeali 

 fortiter carinata ; carina f rontali leviter elevata ; capite inter 

 carinas fortiter rugulose punctulato ; oculis sat latis vix 



