BLACKBURN AND SHARP—On some New Species and Genera of Coleoptera. 187 
10. Ovate species, . : é 6 é , : : C 0 A 4 lil 
A narrow, elongate, rather small species; very shining, with indistinctly 
striated elytra, 0 . ¢ . : . . . . « O. equale. 
11. Antenne rather elongate; elytra not distinctly striated (a rather large, 
shining species), : : ; : : c c : . . O. infernum. 
Antenne short; elytra in front strongly striated, with the strie extremely 
strongly punctured, behind quite smooth (a species of medium size, 
and very shining, of brassy-green colour), : 5 9 : . O. ewnescens. 
Antenne short; elytra strongly punctate-striate, the punctate strie not 
much fainter near the apex than in front (a species of medium size, 
shining, and of a black or reddish-black colour), . . . . O. insulare. 
AM, 18h 
H&TERAMPHUS (nov. gen.). 
This is a remarkable form of Cossonidz, apparently without any ally, having 
all the coxze widely separated, the metasternum very short, and the scutellum 
entirely concealed. In Mr. Wollaston’s arrangement of the Cossonidz, it would 
be placed near Styphloderes and Cotaster, from which, however, it greatly departs 
by the great distance between the front coxze, as well as by the facies, which is 
nearer that of some of the Erirhinida than to any Cossonidz known to me. The 
rostrum is elongate, but not so long as the prothorax, curvate, subcylindrical, and 
quite as narrow immediately in front of the eyes as it is at the apex; the antennz 
are rather long and slender, with elongate scape, seven-jomted funiculus, and 
rather elongate club, the apical half of which is evidently annulate; they are 
inserted at a distance from the apex, but conspicuously in front of the middle ; 
and the scape is lodged in a deep, straight scrobe, which extends vaguely to the 
lower portion of the eye; this organ is rather elongate. The prothorax is large ; 
the front coxee are quite embedded, not at all prominent, widely separated; the 
prosternum is in no way impressed, is not at all emarginate in front, is quite flat 
between the coxze, and has no rudiment of a prosternal process. The middle coxee 
are widely separated ; and the large mesosternum is quite flat, and throughout on 
the same plane as the metasternum ; this lattter is extremely short. The front 
tibiz are armed with a well-developed hook; the middle and hind tibize with a 
rather smaller one; the tarsi are four-jointed, not largely developed, furnished 
with hairs beneath, the fourth joint broader, its hind edge emarginate, but not 
bi-lobed. 
The species show so much difference, that they would, at first sight, scarcely 
be deemed all of one genus. In H. cylindricus the hind coxe are not so extremely 
separated as they are in the other species; and H. hirtellus has the rostrum broader 
at the tip; but at present I do not think it desirable that they should be separated 
generically, as there are probably other species existing in the islands which might — 
connect them more intricately. 
