CARABIDAE. 35 



Group I. — Platyni. 



This group might easily be separated in many minor sub- 

 divisions by including tlie genera not represented in our fauna. 

 The following genera occur with us: — 



Ungues more or less serrate. Mentum toothed. 



Tarsi glabrous above. Elytra witli dorsal punctures. Calathus. 



Tarsi hairy above. Elytra without dorsal punctures. Pristonychus. 

 Ungues not serrate. Elytra with dorsal punctures. 



Mentum toothed. Platynus. 



Mentum not toothed. Olisthopus. 



Olisthopus is represented in the Atlantic region by two species; 

 the other genera occur on both sides of the continent. Of Pris- 

 fonychua two species are known, both of them identical with 

 European forms {complanatus and terricola), and have probably 

 been introduced, the first mentioned being rather widely spread 

 by commerce over the globe. 



Group II. — Perigonae. 



This group is represented by one genus Perigona, which has 

 for its synonyms Trecliicus, Nostra, and Spathinus. The mentum 

 has its epilobes prolonged to an acute spine, the emargination is 

 deep without tooth. The ligula is narrow and truncate at tip, 

 the paraglossae slender and a little longer than the ligula, and 

 united with the latter by a thin almost transparent nienibrane, 

 which extends from the base of the paraglossai to the tip of the 

 ligula. 



The antenno3 are rather stout beyond the third joint, and the 

 second is as long as the third. 



'I'here is certainly no reason why Perigona should be placed as 

 a Truncatipenne. The two supra-orbital setas remove it from 

 association with the Ilarpalide series. Taking its entire organi- 

 zation, it seems better placed in the present tribe than anywhere 

 else. 



Tribe XXL— AlVCHOiXODERIXI. 



Head oval or rounded, not prolonged nor constricted to a nar- 

 row neck; with two supra-orbital setigerous punctures. Antennas 

 slender, not thicker externally. Eyes variable in prominence, 

 but always close to the buccal fissure beneath. Thorax more or 



