COLEOPTEEA. 383 



by some authors with the Scarites, which, in fact, they very much re- 

 semble, both in ai^ijearance and habits. 



Some have a narrrow elongated body, almost forming a parallele- 

 piped, with a nearly square thorax ; the antennae either entirely or 

 partly granose : the last joint of the exterior palpi almost cylindrical, 

 and the same of those of the labium, nearly in the form of a reversed 

 cone, or securiform. They are all exotic. 



MoRio, Lat. 



Antennae equal in size throughout ; labrum profoundly emarginate'* 

 exterior palpi filiform ; thighs oval, with triangular tibiae *. 



Oz^NA, Oliv. 



Antennae thicker or inflated at their extremity ; labrum entire ; 

 labial palpi terminating by a larger and almost securiform or trian- 

 gular joint ; thighs and tibiae narrow and elongated f. 



The others have an oval or oblong body, and the thorax either 

 nearly in the shape of a cup or heart, or almost orbicul'.r ; the an- 

 tennae are filiform, and consist mostly of cylindrical joints, the last 

 particularly; tlie others narrowed at base and nearly in the form of 

 a reversed cone ; the last joint of the exterior palpi is almost oval or 

 fusiform. The labrum is emarginate. 



They are peculiar to the hot and sandy districts of the western 

 countries of the eastern continent, 



DiTOMus, Bon. — Carabus, Calosoma, Scaurus, Fab. 



Palpi shorter than the head; thorax cordiform, or like a cup; tarsi 

 short. 



Some species, those to which Ziegler has restored the generic ap- 

 pellation of Ditomus, have a more elongated body of equal width ; 

 the head separated from each side of the thorax by a re-entering an- 

 gle, and usually armed in the males, with one or two horns J. 



The othei's, or those which compose the genus Aristus, Zieg., have 

 the body shorter, and wider before ; the head almost cotinuous with 

 the thorax, and buried in it up to the eyes ; its anterior angles are 

 pointed §. 



Aptomus, Hoff. — Scarites, Ross. 



The anterior palpi very long; thorax orbicular; tarsi filiform and 

 elongated ; exterior maxillary palpi much longer than the head, and 



* Harpalus monilicornis, Lat. Gener. Crust, et Insect. I, 206 ; Mono monilicomis, 

 Dej.. Spec. I, p. 430 ; Scurites Georgiee, Palis, de Beauv. VII, xv, 5 ; — Morio 

 hrasiUensis, Dej. lb. ; — Morio orierdalis, Id., lb. 



t Ozeena dentipes, Oliv., Encyclop. Method. ; — Oz<ena Rogerii, Dej., Spec. p. 434 ; 

 — Ozcena hrunneu, Id, lb. ; — Ozoena Gi/Jlhenalii, Id. lb. 



X Dejean, Spec. I, p. 439, first division of Ditomus. The Carabus cahjdonius 

 of Fabricius, according to a label affixed by him to a specimen taken from the 

 collection of M. Desfontaines, forms a species very distinct from the Ditomus calydo- 

 nius of Dejean. The mandibles of the male are forked or divided, as it were, into 

 two horns ; the middle horn terminates in a point or rather is hastate at the ex- 

 tremity. The Ccdosoina longicornis of Fabricius is probably the female of this species 

 or of another that is closely allied to it. 



§ Second divisiou of Ditomus of Count Dejean, lb., p. 444. 



