302 



O. vilis, Har., a small species from Somerset (Cape York) ; 

 the elytra clothed with yellowish pubescence, the head and pro- 

 thorax coppery, elytra black, nitid. Certainly unknown to me. 



O. villosiis, Mad. A small species from the far North of W. 

 Australia, clothed above with ashy villosity, the colour black, the 

 ptoQotum retuse and with a median projection in front. I have 

 seen nothing like it. 



O. ocelliger, Har. A small species from Somerset (Cape York); 

 referred to under the heading O. suhocelliger. 



O. ruhicundulus, Macl. A very small species from Queens- 

 land ; unknown to me ; seems to be near O. asper but inter alia 

 differing by its flat elytral interstices. 



O. Thoreyi, Har. Quite insufficiently described ; probably near 

 O. Macleayi, Blackb., but with sexual characters extremely 

 dijfferent, whichever sex the type of O. Macleayi may be. 



O. tabellicornis, Macl. A fairly large species from N. Queens- 

 land (Long., 5 J 1.). Probably a member of my Group II. but as 

 the description gives no information concerning the puncturation 

 of the pronotum nothing contident can be said about it. If it 

 belongs to that group it is probably distinct from any other known 

 species, as the front of its clypeus happens to be described and is 

 different from that of any other species (of the group) whose 

 author has described that part. 



O. lobicoUis, Macl. A species of moderate size (Long., 4 1.) 

 from Cape York. The description of the sculpture of the pronotum 

 is to me unintelligible. However, I know no species that combines 

 the following characters of O lobicoUis, — very nitid, black, head 

 and thorax greenish, thorax smooth (i.e., I suppose, unpunctured) 

 with a large and prominent tubercle in front, head of male with 

 a lamina which (as I read the description) is both elevated and 

 emarginate in the middle. 



O. Froggatti, Macl. I cannot find any definite character in 

 the description of this species to distinguish it from O. lobicoUis, 

 Macl , unless it be that the front of the pronotum is bituberculate, 

 but the description of the pronotum of the latter is so indefinite 

 that I am not sure Sir W. Macleay does not mean to say that the 

 front of its median tubercle is emarginate, — in which case the 

 difference would be slight. 



O. fnrcaiiceps, Mast, {furcatus, Macl). From JST. Queensland 

 {Long., 3^ 1.). A black, nitid, species, with the pronotum un- 

 punctured, and retuse in front with two small tubercles, — the 

 head of the male with two contiguous horns. I have not seen 

 any insect that can be either sex of this species. 



O. acuticeps, Macl. A small species irora the far North of W. 

 Australia ; black ; very nitid ; front of clypeus in male pointed, 

 female rounded ; two short frontal horns (apparently in both 



