206 



LAKE SUPERIOR. 



punctiformis. 



Feronia punc. Say. Am. Tr. 2, 58. 



Agonum rufipes Dej. 3, 173. 

 bembidioides. 



Sericoda bemb. Kb. N. Z. 15. 



Agonum bemb. Lee. 227. 

 4-punctatus. 



St. Fm. Germ. Dej. 3. 170. 

 POECILUS Bon. 



lucublandus Dej. 3, 212. 



Feronia lucub. Say. Am. Tr. 2, 55. 

 chalcites Lee. 231. 



Feronia chalc. Say. Am. Tr. 2, 56. 

 convexicollis Lee. 233. 



Feronia conv. Say. I. I. 

 11 PTEROSTICHUS Bon. Erichs. 

 erythropus. 



Feronia ery. Dej. 3, 243. 



Platyderus nitidus Kb. N. Z. 29. 



Platyderus eryth. Lee. 231. 



mandibularis. 



Argutor mand. Kb. N. Z. 31. 

 patruelis. 



Feronia pair. Dej. 5, 759. 



Argutor pair. Lee. 337. 

 mutus. 



Feronia muta Say. Am. Tr. 2, 44 



Adelosia muta Lee. 335. 

 Luczotii. 



Feronia Lucz. Dej. 3, 321. 



Fer. oblongonotata Say. Am. Tr. 4, 

 425. 



Adelosia oblong. Lee. 335. 

 12 orinomum. 



Omaseus orin. Cs. Kb. N. Z. 32. 

 punctatissimus Rand. B. J. 2, 3. 

 coracinus. 



Feronia corac. Nm. 

 stygicus. 



Feronia styg. Say. Am. Tr. 2, 41. 



striatis, interstitiis planis, 3 io 5-punctato, epipleuris palpis antennisquepiceis, his apice 

 rufis, pedibus rufo-testaceis. Long. -31. 



Varies with the 3 rd elytral interstice 3-punctate. Twice the size of P. lenis, and dis- 

 tinguished by the thorax narrowed behind, basal impressions indistinct, the reflexed 

 margin broader. P. retractus is much smaller, with a wider thorax and deeper basal 

 impressions. 



11 Under this name, following the example of Erichson, I have grouped all the Ameri- 

 can species of Dejean's Feronia, excepting the Poecilus, which are sufficiently distinct 

 by the antenna?. In my catalogue of the Carabica, I admitted as distinct genera nearly 

 all the groups proposed by other authors, and attempted to find natural characters for 

 them. What success I have had in finding structural differences, the reader may be 

 able to judge by referring to the work cited : suffice it to say, that the characters there- 

 in detailed are entirely too finely drawn for any practical purpose, and by the progres- 

 sive variation which accompanies the variations of form and sculpture, plainly indicate 

 the existence of one extensive and natural genus : and fortified as I am by the example 

 of Erichson, and the counsel of Zimmerman, I hesitate no longer to merge them into 

 one group, under the name quoted above. An attempt has been made to separate 

 under the name Hypherpes (Chaudoir) all the species without elytral punctures. But the 

 characters of this group will be found as ill-defined as those which have just been sup- 

 pressed. Feronia lachrymosa (Nm.) can scarcely be told from adoxa but by the superior 

 size, and the presence of elytral punctures ; surely it would be the destruction of all 

 natural classification, to separate into different genera, two such closely allied species. 



12 I have had no opportunity of comparing with European specimens, and give the 

 species as identical on the authority of Kirby and Klug, having in my cabinet an Oregon 

 specimen, which has been actually examined by the latter gentleman. Dr. Zimmer- 

 man thinks it to be different, and proposes the name septentrionalis, which must there- 

 fore be adopted if the species prove distinct. 



