COLEOPTERA. 389 



is transversal ; the Pcecili, 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 Poocili, but whose an- 

 tennae are proportionally 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- 

 tysina, Bonelli, with which we unite that of Omaseus, Zieg., andDcj., 

 and the Catadromus of Mac Leay, Jun. * 



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 a long 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. cylindricus^. 



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 me- 

 ) and the Molops striolatus, Dej., whose antennae are composed 



peared to me that they were most so externally. This Insect may form a separate 

 aubgenus Cyclosomus. As to the preceding ones, see the Species, Gener. des 

 Coleop. Dej., III. 



Those in which the hody 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 Carabus pieimanus, 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 Molops connthius. 

 Those, in which the body nearly forms a parallelepiped, and the thorax is almost 

 square, but slightly or not at all narrowed posteriorly, will constitute a second 

 di\Mon. Of this number are the Platysma nigra, Bonel., and Dej., the Omasei of 

 the latter CataL p, 12 and the Carabus tencbrioides 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 inentum, which is much larger and entire ; 

 the elytra have a large sinus, or rather an cmargination at their extremity. It is 

 one of the largest species of this family. 



The Harpalus nigrita, anthraciiius, and aternmus, of Gyllcnhall, are Omasei. The 

 last has the posterior angles of the thorax obtuse, a circumstance which distinguishes 

 it from all the others. The Carabus leucojtihalmus, Fab. or the melanarius of Illiger, 

 is placed in the same division, but it is apterous. 



f We will add to it the Omascus melanarius, Dej., as well as another species of 

 Germany intermediate between the preceding ones and the Cophosv* cylindricvs, and 

 which, I think, is the Omateus tlongatns Ziegler. 



