1854.] 53 



42. P. crenulatus, nigro-aeneus, minus convexus, thorace subrotundato, 

 latitudine paulo breviore, margine reflexo postice paulo latiore, angulis posticis 

 nullis, basi utrinqu'e profundius impresso, et parce punctulato, elytris thorace 

 duplo latioribus oblongis, 5 vel 6-punctatis, striis tenuibus antice punctulatis, 

 intersf itiis planis, antennarum basi pedibusque piceo-testaceis, vel testaceis. 

 Long. -31. 



Georgia, rare ; Louisiana, Dr. Schaum. This species establishes, by its form 

 and characters, a passage from this group towards P. excavatus among those 

 having three elytral punctures. The elytra are broader and more square in their 

 outline than in any other species of this group, to which, nevertheless, it seems 

 most closely related ; in one specimen three joints of the antenna? are pale, in 

 the other only the first one is dark testaceous. 



43. P. striatopunctatus, aeneo-niger, elongatus nitidus, thorace ovali 

 latitudine longiore, margine reflexo postice latiore, angulis posticis nullis, basi 

 utrinque profunde impresso, et obsolete punctulato, elytris thorace duplo latiori- 

 bus, elonjjato ovalibus, striis punctulatis satprofundis, interstitiis paulo convexis, 

 antennarum articulo lmo pedibusque testaceis. Long. -24 *3. 



Agonum striatopunctatum Dej. Sp. Gen. 3, 167. 

 Agonum decipiens Lee. Ann. Lye. 4, 229. 



Georgia. Has very much the form of P. nutans, but is smaller and darker 

 colored ; the strice of the elytra are deeper and distinctly but finely punctured. 



44 P. re tract us, niger, nitidus, thorace rotundato-ovali, latitudine non 

 breviore, postice modice angustato, angulis posticis valde rotundatis, margine 

 tenui postice latiore subreflexo, basi utrinque longitudinaliter sat profunde im- 

 preasa, elytris ovalibus, picescentibus thorace plus sesqui latioribus, striis mo- 

 dice profundis, interstitiis subconvexis, 3io punctis 4 vel 5-impresso, pedibus 

 rufis, antennis piceis basi rufo-testaceis. Long. *27 3. 



Lee Agassiz' Lake Superior, 205. 



Agonum retractum Lee. Ann. Lye. 4, 228. 



? Agonum lenum Dej. Sp. Gen. 3, 166. 



Lake Superior, Massachusetts and New York. The first specimen described 

 by me was defective in having very small elytral punctures, whereby I was led 

 into the error of describing the elytra as having only three punctures on the 

 third interstice. The thorax is larger and wider in proportion than the last spe- 

 cies, but the elytra are wider and less elliptical than in the remaining species of 

 this group, and the stria? are deeper. I am somewhat doubtful about referring 

 Dejean's description to this species, since not only the first joint of the antennae, 

 but very frequently three or four joints are paler than the outer joints, and the 

 striae of the elytra, in comparison with the following species, could hardly be 

 called fine. As, however, Dejean implies that the sides of the thorax are some- 

 what reflexed posteriorly, I must acknowledge that my reference of his species 

 to what is described below as P. picipennis, must be considered faulty. 



45. P. ruficornis, piceo-niger nitidus, elongatus, thorace latitudine paulo 

 longiore, ovali, postice paulo angustato, angulis posticis rotundatis, margine 

 tenuiter reflexo postice paulo latiore, impressionibus basalibus latis minus pro- 

 fundis, elytris elongato-ellipticis, thorace vix sesqui latioribus, piceis striis tenu- 

 ibus, interstitiis planissimis, 3io punctatis 5 7 impresso, pedibus rufis, antennis 

 piceis extrorsum pallide rufis. Long. *31. 



Lee. Agassiz' Lake Superior, 205. 



? Agonum picipenne var. C and D. Kirby, Fauna Bor. Am. 25. 



Lake Superior. Larger than the preceding and following species, and besides 

 the difference in the thorax, readily distinguished by the antennae being much 

 paler from the fourth joint outwards. I have cited Kirby, because he says that 

 the varieties mentioned have the second, third and fourth joints of the antennae 

 piceous, and the rest ferruginous; in my specimens the first joint is rufous in 

 one, and piceous in the others. 



46. P. p i c i p e n n i s, niger nitidus, elongatus, thorace ovali, latitudine Ion- 



