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conclusion from his reading the very insufficient descriptions of 

 those two. For my own part I cannot think that granum is very 

 near parvus otherwise than superficially, if my identification of 

 the latter (my reasons for which will be found under the heading 

 of parvus) be correct. It is not of much use to compare an 

 OnthopJiagus with an almost undescribed insect without stating 

 the grounds on which it has been identified, so that the correct- 

 ness or otherwise of the determination can be estimated, 



O. promptus, Hsiv. A brightly metallic species from "ISTorthern 

 Australia," of moderate size (Long., 3 — 3f l), clypeus non- 

 emarginate in front, head bicarinate, antennae red, pronotum 

 neither retuse nor tuberculate, the elytral interstices subconvex, 

 feebly but closely punctulate. I do not think I have seen it, nor 

 can I place it in any group as the description makes no reference 

 to the base of the pronotum. It seems to me very probably 

 identical with 0. viridiohscurus, Blanch. 



O. discolor^ Hope. There can hardly be a doubt I think that 

 this is a synonym of O. viridiohscurus, Blanch, The description 

 is shorter than that of viridiohscurus but does not indicate any 

 definite distinctive character. The size quoted is the same. The 

 habitat of viridiohscurus (Raffles Bay) is very near to that of 

 discolor (Port Essington), 



O. viridiohscui^us, Blanch. This is a species of moderate size 

 (Long., 3J1,) from the Port Essington region, nitid, dark metallic 

 green, the clypeus non-emarginate in front, head without a frontal 

 elevation (discolor is said to have a frontal carina, probably 

 sexual), pronotum very finely punctulate and without carina or 

 tubercle, elytra with striae strongl}' punctulate and interstices 

 evidently convex and very finely punctulate, antenn?e brown (in 

 the description of discolor called yellowish). I do not know any 

 species near enough to 0. viridiohscurus to need any statement of 

 differentiating characters, — except of course the preceding two, 

 which are probably not distinct from it. 



O. rubescens, Macl. A very small species (Long., HI.) from 

 the far North of W, Australia. Apparently very near to 

 O. cruciger, Macl. (from the same region) but somewhat differ- 

 ently marked with blackish and having elytral interstices (not 

 " smooth", but) minutely punctulate. 



O. minusculus, Macl, From same region and of same size as 

 the preceding. Also very near cruciger, Macl,, but pronotum 

 without lateral red blotch and the elytra more deeply punctulate- 

 striate with interstices slightly convex and minutely punctulate, 



0. Fabricii, Waterh. A very small species from Queensland, 

 closely allied to O. quadripustulatus, Fab,, its pronotum more 

 sparsely punctulate and the head between the carinsD distinctly 

 punctulate. 



