COLEOPTBRA. 
389 
is transversal ; the Poecili, where it is almost as long as it is wide, 
and where the third joint of the rather short antennae is compressed 
and angular ; and the Argutores similar to the Poecili, but whose an- 
tennae are proportionably longer, and their third joint not angular. 
2. The species usually furnished with wings, but in which the 
body is straight, plane or horizontal above, with a nearly equally wide 
head. They frequent cool or damp places. Such is the genus Pla- 
tysma, Bonelli, with which we unite that of Omaseiis, Zieg., and Dej., 
and the Catadromus of Mac Leay, Juii. * * 
3. The third division of the Feroniae will consist of species analo- 
gous to those of the preceding one in the ensemble of their characters, 
but differing from them by the absence of wings. 
Of these, some, the most numerous, and in which the thorax is 
not always in the form of a truncated heart, have a well-marked, 
continuous, transverse fold or border at the base of the elytra, that 
extends to the suture. 
Sometimes the thorax is almost square, or has the form of a trun- 
cated heart, with acute posterior angles. 
Those, in which the body forms along or cylindrical square, where 
the thorax is almost square, hardly narrower behind than before, 
form the genus Cophosus of Ziegler and Dejean. It was established 
on an Austrian species, the C. crjlindricusf. 
Those in which the body is generally oval, depressed, or but 
slightly concave above, with a wide, nearly square, and subisome- 
trical thorax, whose lateral margin is always strongly reflected, and is 
as wide, or nearly as wide, at its posterior margin as the base of the 
elytra, compose the genus Abax of Bonelli. 
Several species are found in Germany. The one called the 7ne- 
tallicus, and the Molops striolatus, Dej., whose antennoe are composed 
peared to me that they were most so externally. This Insect may form a separate 
subgenus — Cyclosomus. As to the preceding ones, see the Species, Gener. des 
Coleop. Dej., III. 
* Those in which the body is much flattened, and the thorax considerably nar- 
rowed posteriorly in the form of a truncated heart, will constitute a first division ; 
such is the Carahus picimanus, Duft., or the C. monticola of others; Count DeJean 
places it in Pterostichus ; certain Brazilian species also belong to it. M. Germar — 
Insect. Nov. Spec. I, 21 — describes one of them under the name of Mulops corinlhius. 
Those, in which the body nearly forms a parallelopiped, and the thorax is almost 
square, but slightly or not at all narrowed posteriorly, will constitute a second 
division. Of this number are the Platysma nigra, Bonel., and Dej., the Oinasei of 
the latter — Catal. p, 12 — and the Carahus tenebrioides of Olivier, the type of the 
subgenus Catadromus of Mac Leay, Jun. — Annul. Javan. I, p. 18, 1, 5 — which only 
differs from Omaseus in the tooth of the mentum, which is much larger and entire ; 
the elytra have a large sinus, or rather an emargiuation at their extremity. It is 
one of the largest species of this family. 
The Harpalus nigrita, anfhracinus, and atcrrimus, of Gyllenhall, are Omasei. The 
last has the posterior angles of the thorax obtuse, a circumstance which distinguishes 
it from all the others. The Carahus leucopthalmus, Fab. or the melanarius of Illiger, 
is placed in the same division, but it is apterous. 
-f- We will add to it the Omaseus melanarius, Dej., as well as another species of 
Germany intermediate between the preceding ones and the Cophosus cylindricus, and 
which, I think, is the Omaseus elongatus Ziegler. 
