COLEOPTERA. 45 



ated; where the thighs differ but little in size, and when the anterior 

 tibiae are in the form of an elongated triangle, and angular. 



These Hcteromera are peculiar to South America *. 



The other Pimeliariw, with moniliform antennae and the mentura 

 entire, are remarkable for the lateral, angular or strongly dentiform 

 dilatations of the thorax. The middle of the back presents a sulcated 

 carina terminated anteriorly in the manner of a rounded and bilobate 

 gibbosity. The lateral margins of tlie head are briefly dilated. The 

 labrum is entirely exposed and of an ordinary size. The eyes ara 

 more prominent than in the other Pimeliarise; the antennae, besides, 

 are pilose or pubescent. 



The elytra are very unequal. 



Sevidium, Fab. 



They are found in the southern countries of Europe and in Afx'ica f. 



The last Pimeliarise, the mentum as in the preceding ones, being 

 vmemarginate s\iperiorly, are removed from the latter by the form of 

 the joints of their antennae; they are mostly cylindrical or in the form 

 of an elongated and reversed cone ; the three or four last are alone 

 rounded, and either ovoidal, turhiniform or hemispherical. The 

 labrum is entirely exposed, and the marginal dilatation of the head 

 covering the origin of these organs is but slightly prolonged, as in 

 Sepidium. The eyes are nearly round or oval, entire or but slightly 

 emarginate and prominent ; the thorax is depressed, sometimes dilated 

 on each side in the manner of an angle, sometimes narrower, but sul- 

 cated and carinated above; the last joint of the antennae is evidently 

 longer and thicker than the preceding. 



These Insects are proper to the Cape of Good Hope. Such are the 



Trachynotus, Lat. — Sepidium, Fah.-l 



There, the eyes are narrow, elongated, and almost flat. Tlie tho- 

 rax is convex, almost orbicular, emarginate before, truncated poste- 

 riorly, without angular dilatations and dorsal carina. The second 

 joint of the antennae is, at most, the size of the preceding. 



MoLURIS, LaL PiMELIA, Fob., Oliv. PsAMMODES§,.fi'zV6y. 



The second tribe of the Melasoma, that of the Blapsides, receives 

 its denomination from the genus Blaps of Fabricius. 



The maxillary palpi terminate by a manifestly securiform or trian- 

 gular joint. M. Dufour has observed, that in this genus as well as in 

 that of Asida, the crop is less developed than in the Pimeliarise, and 

 that the little valve, at which it terminates posteriorly, is not formed 



* Germ., Insect. Spec. Nov., p. 136. 



-f- The Sepid. tricuspidatum, variegatum, and cristaium of Fabricius. 



X The Sepid. reticukifum, rugosum, vittatum of Fabricius; the S. acuminatum of 

 Schoenherr. A species, which Count Dejean calls the cuctuiioides, and figured by De 

 Geer, forms a separate division. 



§ The Pimeliae striata, imicolor, gihba of Fabricius. See Lat., Gener. Crust, et 

 Insect., II, p. 148; — Psammodes lungicornis, Kirb., Lin. Trans., XII, xxi, 13. 



