1851.] 51 



33. P. limbatus, nitidus, capite thoraceque saturate piceo-rufis,'hoc ro- 

 tundato, tenuiter marginato, basi utrinque puncto magno impresso, elytris thorace 

 hand sesqui latioribus nigris margine lato testaceo, tripunctatis, striis fortius 

 puuctatis, postpectore abdomineque nigris, antennis piceis basi, palpis pedibus- 

 que testaceis. Long. -35. 



Feronia limbata Say, Trans. Am. Phil Soc. 2, 47. 

 Agonum palliatum Dej. Sp. Gen. 3, 174. 



Georgia, Illinois and Pennsylvania. A more robust species than the preceding, 

 with a larger thorax. 



E. 



A. group containing winged species of a metallic or submetallic color, with 

 the base of the antennae, the palpi and the legs, or at least the tibiae and tarsi 

 yellow. The thorax is slightly cordiform, narrowly margined, with the poste- 

 rior angles obtuse and slightly rounded ; the basal impressions are deep, mode- 

 rately large and punctulate ; the elytra are twice as wide as the thorax, truncate 

 at base, moderately convex ; the striae are punctured ; the third interstice has 

 three punctures, of which the second is on or near the second stria. 



34. P. as r u g i n o s u s, piceo-aeneus, nitidus, thorace latitudine subbreviore, 

 ovali, convexo, tenuiter marginato, angulis posticis rotundatis, impressionibus 

 basalibus parvis minus impressis, elytris thorace duplo latioribus, ovalibus, con- 

 vexis, tenuiter striatis, rnterstitiis planis, 3io tripunctato, antennarum basi pedi- 

 busque piceo-testaceis. Long. 23 *28. 



Agonum aruginosum Dej. Sp. Gen. 3, 168. 



Vermont, Pennsylvania, Illinois, Georgia. By the small size of the basal im- 

 pression of the thorax, this is readily distinguished from the other species, of this 

 group. Sometimes the antennae appear entirely brownish black, but usually the 

 first joint, at least, is reddish. 



35. P. exc a va t u s, aenpus, nitidus, thorace latitudine non breviore, parum 

 convexo, postice subanaustato, basi punctulato utrinque profunde impresso, an- 

 gulis posticis obtusis rotundatis, elytris thorace duplo latioribus tenuiter striatis, 

 striis versus basin subtiliter punctulatis, interstitio 3io trifoveato, antennis basi 

 pedibusque piceo-testaceis. Long. 28. 



Agonum ezcavatum Dej. Sp. Gen. 3, 1@9. 



Middle and Western States ; not rare on the banks of streams. 



36. P. fe r r e u s, nigro-aeneus, nitidus, thorace latitudine fere longiore con- 

 vexo, postice paulo angustato, basi punctulato utrinque profunde impresso, an- 

 gulis posticis obtusis, subrotundatis, elytris convexiusculis, tripunctatis, striis 

 profundis usque ad medium valde punctatis, versus apicem minus impressis an- 

 tennarum basi tibiis tarsisque piceo-testaceis. Long. 3. 



Agonum. ferreum Hald. Proc Acad. Nat. Sc. 1, 299. Lee. Ann. Lye. 4, 228. 

 Agonum ocreatum Hald. Proc. Acad. Nat. Sc. 1, 299. (Sp^c. immat.) 

 Middle and Western States ; not common. The striae of the elytra are quite 

 faint towards the tip, which is obliquely subsinuate. 



37. P. e r r a n s, obscure cyaneo-aeneiis, nitidus, thorace latitudine paulo bre- 

 viore, paulo convexo, postice maijis angustato, basi vix punctulato, utrinque 

 profunde impresso, angulis posticis obtusis rotundatis, elytris thorace duplo 

 latioribus paulo convexis, tripunctatis, striis angustis impunctatis, antennis fuscis, 

 articulis 3 pedibusque rufis. Long. *29. 



Feronia errans Say, Journ Acad. Nat. Sc. 3, 147. 



Agonum errans Say, Trans. Am. Phil. Soc. 4, 423. 



One specimen found on Platte River, Nebraska. Very similar to the next, 

 but the thorax is longer and more distinctly narrowed posteriorly; the stria? of 

 the elytra are absolutely without punctures, and the base of the antennae is 

 much paler. 



38. P. sub c o r d a t u s, cupreo-aeneus (raro viridi-aeneus) nitidus, thorace 



