52 [April, 



minus convexo, latitudine breviore, postice subangustato, basi punctulato, 

 utrinque latius profunde impresso, angulis posticis obtusis subrotundatis, elytris 

 thorace fere duplo latioribus minus convexis, tripunctatis striis angustis versus 

 basin subtiliter punctulatis, antennis nigro-piceis, articulo lrao pedibusque piceo- 

 rufis. Long. *3 34. 



Lee Agassiz' Lake Superior, 205. 



?Agouum erythropum\\ Kirby, Fauna Eor. Am. 28. 



Sandy Lake, Upper Mississippi ; the green variety was found in Nebraska, 

 near the Rocky Mountains. By the change of genus Kirby's name becomes a 

 homonym of P. erythropus Dej. above described. As Mr. Kirby does not 

 mention the punctures of the base of the thorax, nor of the striae of the elytra, I 

 am not certain that his species is the same as the one described ; should it prove 

 to be different from mine, the name P. Ki rb y i must be applied to it. 



39. P. b a sa 1 i s, asneus, nitidus, thorace latitudine non breviore ovali con- 

 vexiusculo, postice subanguscato, angulis posticis rotundatis, impressionibus 

 basalibus profundis parce punctulatis, tuberculo obsoleto instructis, elytris tho- 

 race duplo latioribus oblongis, minus convexis, striis modice profundis, inter- 

 stitiis paulo convexis, 3io subtiliter tripunctato, antennis piceis, articulo lmo 

 pedibusque rufis. Long. *3. 



Agonum basale Lee. Ann. Lye. 4, 227. 



One specimen found in Nebraska, near the mountains. From its color and 

 form this species, at first sight, resembles a small specimen of P. extensicollis, 

 but on comparison it is found completely different. The basal impressions of the 

 thorax are not prolonged anteriorly, and the margin is not wider at the rounded 

 posterior angles. The third interstice of the elytra has only three very small 

 punctures, of which the second and third are placed on the second stria. 



40. P. v a g ans, virescente-aeneus, nitidus, thorace latitudine non breviore, 

 ovali, postice subangustato, margine postice paulo latiore, angulis posticis ro- 

 tundatis, impressionibus basalibus profundis, parce punctulatis, elytris thorace 

 duplo latioribus, oblongo-ovalibus, parum convexis, striis sat profundis obsolete 

 punctulatis, interstitiis vix convexis, 3io subtiliter tripunctato, antennis piceis, 

 articulo lmo pedibusque rufis, genubus, tarsisque paulo infuscatis. Long. 29. 



One specimen, New York. Resembles in form P. nutans, but the elytra have 

 only three small punctures (the second near the second stria on one elytron, and 

 near the third on the other ;) the striae are deeper and very finely punctulate ; 

 from P. subcordatus, it differs by the longer thorax. 



F. 



Winged species of a slender form, usually black, sometimes, hower, piceous, 

 and in one instance of a metallic green color ; the base of the antennae and the feet 

 are yellow ; the thorax is oval, with the margin narrowly reflexed becoming 

 broader towards the posterior angles, which are rounded and indistinct; the 

 basal impressions are narrow, sometimes deep and smooth, sometimes nearly 

 obsolete. The elytra are elongate oval, twice as wide as the thorax, moderately 

 convex, emarginate at the base and obliquely subtruncate at tip; the striae are 

 fine, the interstices flat, the third marked with five or six punctures. 



41. P. nutans, capite thoraceque viridiaeneis,hoc ovali, latitudine longiore, 

 margine angusto reflexo postice latiore, angulis posticis. nullis, impressionibus 

 basalibus profundis laevibus, elytris thorace duplo latioribus, elongatis, aeneis 

 nitidis, 5-punctatis, striis tenuibus impunctatis, antennis nigris articulo lmo 

 pedibusque piceo-rufis, femoribus apice infuscatis. Long. ; 27 35. 



Feronia nutans Say, Trans. Am. Phil. Soc. 2, 52. 



Agonum nutans Say; ibid. 4, 423, (syn. excl.); Lee. Ann. Lye. 4, 227. 



A so num femoral um Dej. Sp. Gen. 3, 146. 



Middle and Western States ; also in Nebraska. Say, in the fourth volume above 

 cited, makes the unaccountable error of referring Agonum striatopunctatum Dej. 

 to this speciest 



