59 



• 



tibiae are short and stout, the liind tarsi are quite as long as the 

 tibiae and rather stout. 



Slam (Mouhot!). 



A Single specimen which I believe to be a female; I bave also 

 among Mouhot's insects a second specimen whicli I believe to be the 

 female of a closely allied but distinct specics. This peculiar Ontho- 

 pjmgus is best placed near tlie african 0. maculatus , to which it is 

 closely allied, and which species Erichson proposed to separate from 

 Ontlwpliagus as a distinct genus with the name Chalcoderus; though 

 the species I here describe is nndoubtedly an ally of the african in- 

 sect , ye! it differs therefrom by its more distinctly margined base 

 of the thorax, and the mentum though elongate and channelled along 

 the middle, appears to be scarcely so long at the sides as in 0. ma- 

 culatus , but as to this I do not speak very positively owing to the 

 difficulty of seeing it accurately without dissection. 



Onthophagus aper (n. sp.): Ohscure viridi-aeneus , subopacus, an- 

 tennis rufis, clava rufo-fusca; supra dense fortiterque granidatus ; pro- 

 thorace hast medio depresso; elytris aeneo-fuscis, striatis. — Long. 7 mill. 



Clypeus rounded in front, greenish brassy with the front margin 

 narrowly purple, its surface rugose, on the middle with an obsolete 

 line. Thorax only slightly convex in the longitudinal direction, coar- 

 sely and densely granulate punctate, the basal margin almost wanting, 

 the apex in the middle distinctly depressed. Elytra of a more ob- 

 scure colour than the head and thorax, distinctly striate, coarsely 

 granulate. Pygidium convex, roughly granulated. Metasternum and 

 femora beneath coarsely punctured, the former prominent in the 

 middle in front. 



Menado (Wallace!). 



A Single individual which ] have no doubt is a male. The 

 species is closely allied to 0. rudis, but is larger and broader, the 

 clypeus is shorter, the thorax less convex and without the lateral im- 

 pressions of nidis. 



Oniliophagus ovilis (n. sp.): Niger . suhopacus, supra nudus; an- 

 tennis rufis clava picescente, a/rticulo basali margine antico laminato et 

 crenulato; prothorace a?iterius crehre sed obsolete punctato, basin versus 



