COLEOPTEEA. 
383 
by some authors with the Scarites, which, in fact, they very much re- 
semble, both in appearance and habits. 
Some have a narri'ow elongated body, almost forming a parallelo- 
plped, 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. 
Mokio, Lat. 
Antennae equal in size throughout ; labrum profoundly emarginateJ 
exterior jDalpi filiform ; thighs oval, with triangular tibiae * * * § . 
Oz^NA, OUv. 
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 orbicular ; the an- 
tennae are filiform, and consist mostly of cylindrical joints, the last 
particularly ; the 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 pecidiar 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 Avhich 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 
The others, 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 ; Morio monUicornis, 
Dej.. Spec. I, p. 430 ; Scarites Georgice, Palis, de Beauv. VII, xv, 5 ; — Morio 
hrasiliensis, Dej. Ib. ; — Morio orierdulis, Id., Ib. 
-f- Oztena dentipes, Oliv., Encyclop. Method. ; — Ozeena Rogerii, Dej., Spec. p. 434 ; 
— Ozcena hrunnea, Id, Ib. ; — Ozcena Gyllhenulii, Id. Ib. 
J Dejean, Spec. I, p. 439, first division of Ditomus. The Carabus calydonius 
of Fabricius, according to a label affixed by him to a specimen taken from the 
collection of M. Desfontaines, forms a species very distinet 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 Calosoma longicornis of Fabricius is probably the female of this species 
or of another that is closely allied to it. 
§ Second division of Ditomus of Count Dejean, Ib,, p. 444. 
