54 [April, 



giore, tenuiter rnarginato, angiitis posticis rotundatis, itnpressionibus basalibus 

 angustis parum profundis, elytris thorace latioribus, elongato-ellipticis, piceis, 

 striis tenuibus, interstitiis plants 3io punctis 4 6 impresso, epipleuris pedibusque 

 pieeo-testaeeis, antennis nigro-piceis, articulo lmo rufescente. Long. -25 27. 



Agonum picipenne Kirby, Fauna Bor. Am. 25. 



Agonum lenum% Lee Ann. Lye 229. 



Platynas lenis\ Lee. Agassiz' Lake Superior 205. 



Middle States, Nebraska and Lake Superior. The elytra are sometimes nearly 

 black, and sometimes nearly testaceous ; the lateral margin of the thorax is not 

 dilated posteriorly. In the paler specimens the antennae are piceous, with the 

 first three or four joints testaceous. 



47. P. lutulentus, piceo-testaceus, nitidus elongatus, capite nigro, thorace 

 ovali, latitudine longiore, tenuissime rnarginato, angulis posticis rotundatis, itn- 

 pressionibus basalibus parvis minus impressis, elytris thorace latioribus, elongato- 

 ellipticis, striis tenuibus interstitiis planis, 3io punctis 4 maiusculis impresso, 

 antennis piceis, articulo lmo rufo. Long. -26. 



Maine and Lake Superior. Apart from the difference in color, this species 

 differs from the preceding in having the thorax still more finely margined, with 

 the basal impressions smaller and less marked ; the striae of the elytra are finer, 

 and the punctures appear to be larger and never more than four in number. I 

 formerly distributed this species as Agonum sordens Kirby, (Fauna Bor. Am. 

 25,) but on reviewing the subject; I find that it does not correspond with his 

 description. The color beneath is about the same as above, and varies from pale 

 piceous to deep piceous. 



48. P. n i g r i c e p s, pallide testaceus, nitidus, elongatus, capite nijjro, tho- 

 race elongato, subquadrato, latitudine longiore, lateribus paulo rotundatis, basi 

 angulisque posticis rotundatis, tenuissime rnarginato, impressionibus basalibus 

 parvis, minus impressis, elytris thorace sesqui latioribus elongato-ellipticis, striis 

 tenuibus, interstitiis planis 3io punctis 4 subtilibus impresso, sutura thoracisque 

 disco longitudinaliter infuscatis, antennis piceis, basi testaceis. Long. 25. 



Lee. Agassiz' Lake Superior, 205. 



Agonum nigriceps Lee, Ann. Lye 4, 229. 



One specimen, Eagle Harbor, Lake Superior. The appearance is very much 

 like that of Demetrias atricapillus of Europe ; the elytra are somewhat more dis- 

 tinctly sinuate at the apex than in the other species of this group, and are, in- 

 deed, almost obliquely truncate ; the sutural striae is deeper than the others. 



G. 



A group containing but one winged species of a metallic green color, and mo- 

 derately stout figure ; the thorax is rounded, slightly truncate at base, very finely 

 margined, with the basal impressions small and deep; the elytra are subellip- 

 tical, emarginate at base, slightly sinuate at tip, finely striate, with several 

 large quadrate foveae on the third interval. 



49. P. octopunctatus, supra aeneo-viridis, vix nitidus, thorace rotundato, 

 tenuiter rnarginato, basi snbtruncata, utrinque fovea profunda impressa, elytris 

 thorace sesqui latioribus ellipticis, tenuiter striatis, foveis quatuor quadratis ob- 

 scuris profundis utrinque impressis, antennarum' basi pedibusque piceo-rufis, 

 femoribus aeneo-micantibus. Long. -3. 



Carabus octopunctatus Fabr. Ent. Syst. Suppl. 55. Syst. El. 1, 186. 



Feronia octopunctata Say, Trans. Am. Phil. Soc. 2, 51. 



Agonum octopu?ictatum Dej. Sp. Gen. 3, 136. 



Middle and Western States. The elytra are frequently tinged with coppery 

 from the suture as far as the fourth stria, and have occasionally five foveae. The 

 under surface is shining blackish green. 



