MR. CURTIS ON HYPOCEPHALUS, A GENUS OF COLEOPTERA. 231 



forming slender subclavate lobes. Eyes placed behind the antennae, lateral, oval, oblique, protected 

 in repose by the projecting margin of the crown, moderately convex, and finely granulated. Antennae 

 (f. 4 & 1 a) remote from the base, inserted behind, and at the base of, the anterior lobes of the head, 

 glossy, depressed beyond the middle, sparingly clothed with depressed hairs on all sides, much shorter 

 than the head, 11-jointed, basal joint oval, the longest and stoutest, 2nd the smallest, cup-shaped, 

 3rd obovate, truncate, longer than the following, which are cup-shaped, distinctly articulated, almost 

 imperceptibly increasing in diameter to the middle, being slightly produced on the inside and dimi- 

 nishing to the extremity, apical joint somewhat obcordate. Underside of head (f. 1) exceedingly 

 polished, the sides punctured, rugose, the lines from the hinder lobes emarginate, leaving a large 

 triangular space, when the head is porrected (*), membranous in the centre and striated transversely, 

 with a circular cavity before the middle, the sides irregularly striated, pubescent at the base. Eyes 

 not visible from beneathf. Labrum invisible (" petit, triangulaire," Desm.). Mandibles strong (j»), 

 porrected, slightly drooping, parallel, conical yet flattened, with a large tooth on the outer margin. 

 Maxillae invisible : Palpi (f.p) long and stout, inserted immediately under the mandibles, hairy and 

 rough at the base, attached to 2 minute scapes, 4-jointed, slightly pilose at the extremities, 2 basal 

 joints clavate, elongated, 1st a little the longest and stoutest, 2nd clavate, 3rd obovate truncate, 4th 

 a little the broadest, axe-shaped, being truncated obliquely, the apex spongiose. Mentum (f. 4*) 

 transverse-oval, the margin trilobed, the central lobe trigonate, the lateral lobes pilose. Palpi (p) 

 nearly as long as the maxillary and very similar in form, attached to two approximating scapes, 

 triarticulate, basal joint longest and the stoutest, 2nd nearly as long, 3rd axe-shaped, truncated ob- 

 liquely. Thorax very large, egg-shaped, very convex and smooth, sides margined, anterior margin 

 ciliated, with a deep and broad channel before, formed by the base of the head; hinder margin con- 

 cave before the pseudo-scutellum which is large, trigonate, very rough, the apex shining and some- 

 what acuminated, with a slight ridge down the centre. Anterior margin of the antepectus forming 

 a large triangular space (f. l.s), the point terminating in a semicircular cavity, the margins with a 

 row of 6 trigonate blunt teeth on each side, becoming broader as they approach the head, the whole 

 like the molars of an elephant, and ciliated internally with short stiff hairs. The sternum forms a 

 long, linear, deeply channeled lobe, between the coxae, the apex very dilated, cordate, with a very 

 elevated ridge in the centre, like a nose in profile (a. p) : postpectus very ample, forming an emar- 

 ginate lobe between the middle pair of legs ; posterior margin very sinuated before the hinder coxae, 

 the lobe between them tongue-shaped, the margins thickened (fig. p. p). Elytra scarcely so large as 

 the thorax, very convex, margined, acuminated, connate, the base depressed and the sides forming 

 slightly raised angulated plates ; coriaceous, rugose, with 4 slightly raised thread-like, oblique, lon- 

 gitudinal lobes. Abdomen very small, trigonate-conic, 5-jointed, very smooth, the sides and apex 

 alone edged with pubescence. Legs enormously stout and powerful, especially the hinder pair : 

 coxae received into large orbicular sockets, globose or conical, trochanters subovate, the hinder form- 

 ing large conical prominent lobes or spines : Thighs short and stout, anterior the shortest, hinder 

 the largest, scooped out beneath and forming a flattened tooth on the outside, near the middle ; apex 

 deeply notched : tibiae very strong, somewhat flattened and dilated, longer than the thighs ; anterior 

 with a large lobe on the outside of the apex and another at the middle, with 2 strong spurs on the 

 inside of the apex : middle pair similar but a little longer, spines the same but smaller, the truncated 

 apex ciliated : hinder pair the longest, less dilated, very much incurved, compressed towards the apex, 

 which forms a claw on the under side, with a small tooth inside ; it is truncated obliquely, forming 

 a heel above, and densely clothed with fulvous soft hairs : tarsi 5-jointed, long, slender ; anterior the 

 shortest (f. 5), a little dilated, basal joint elongated bell-shaped, 2nd somewhat cup-shaped, 3rd smaller, 

 4th the smallest, all the angles produced into teeth ; underside smooth, excepting 2 lines of hairs on 



f In Mr. Westwood's figure they are visible. 



