<214 CLASS INSECTA. 



antennae proportionally longer, of which the third articu- 

 lation is not angular. 



2nd. The species generally winged, but whose body is 

 straight, plane, or horizontal, above, with the head of nearly 

 equal breadth with the body. They frequent green or humid 

 places. Such is the genus Platysma of M. Bonelli, to 

 which we unite that of Omaseus of M. M. Ziegler and 

 Dejean, and that of Catadromiis of the younger Mr. 

 Macleay.* 



3rd. The third division of Feronia will be composed of 

 species analogous to those of the preceding, in the assem- 

 blage of their characters, but which differ by the absence of 

 wings. 



Among these species, some, and the most numerous, and 

 whose corslet is not always in the form of a truncated heart, 

 have at the base of the elytra a fold, or transverse edging, 



* Those whose body is very much flatted, with the corslet remarkably 

 narrowed, posteriorly, in the form of a truncated heart, will form a first 

 division; such is the carabus picimanus of M. Duftschmid, or the C. Mon- 

 ticola of some others. M. le Comte Dejean places it with Pterostichus. 

 Some species of Brazil will also enter here. M. Germar (Insect. Nov. Spec. 

 I. p. 21) has described one of these under the name of Molops Corinthius. 



Those whose body is almost parallelipiped, with the corslet almost 

 squared, little or not at all narrowed behind, will form a second division of 

 this number; these are the platysma nigra of M. M. Bonelli and Dejean, the 

 Omaseus of the latter (Catal. p. ) 2), and the Carabus tenebrioides of Olivier, 

 the type of the sub-genus catadromus, of Mr. Macleay, the son, (Annal. 

 Jav. I., p. 18. 1. V.) which do not differ from that of Omaseus, but in 

 the tooth of the chin, which is much larger, and entire. Its elytra have 

 at their extremity a large sinus, or rather an emargination. It is one of 

 the largest species of this family. 



The HARPALi, nigrita, anthracinus, and atterrimus of M. Gyllenhall, 

 are Omasei. The last has the posterior angles of the corslet obtuse, 

 which distinguishes them from all the others. We place in the same 

 sub-genus the carabus leucopthalmus of Fabricius, or the Melanarms of 

 Iliger, but it is apterous. 



