y 



50 [April, 



rotundato, angulis posticis obtusis rotundatis, lateribus late rotundatis, margine 

 anguste reflexo, basi utrinque late impressa, tuberculo indistincto instructo, 

 elytris thorace sesqui latioribus, paulo convexis, tripunctatis, striis profundis, 

 interstitiis paulo convexis. Long. -35. 



San Francisco and San Diego, California, not rare. I was inclined to refer 

 this species to Agonum brevicolle Dej ., (Sp. Gen. 3, 159) but on examining seve- 

 ral specimens, I find that the elytral punctures are always three: the second is 

 placed about the middle on the third stria, as in most of the species above 

 described : the lateral margin of the thorax is hardly wider towards the poste- 

 rior angles than at the middle: the basal impressions are sometimes slightly ru- 

 gous and punctulate. The form of the thorax is somewhat that of P. Harrisii, 

 but is less rounded on the sides. 



30. P. quadratus, aeneo-niger, nitidus, thorace latitudine paulo breviore, 

 quadrato, postice subangustato, basi media truncata, margine reflexo postice 

 paulo latiore, angulis posticis vix rotundatis, impressionibus basalibus profundis, 

 subtiliter rugosis, elytris thorace duplo latioribus minus convexis subquadratis, 

 tripunctatis, striis sat profundis, interstitiis fere planis. Long. .34. 



One specimen, Oregon. Enough remains of the antennae and feet, to show 

 that they were black. This species has a comparatively smaller thorax than 

 the others of this group, and seems to establish a passage towards group (C d,) 

 from which, however, it differs in having the basal impressions of the thorax 

 more excavated, and not prolonged anteriorly. The sides of the thorax are 

 moderately rounded anteriorly : the second elytral puncture is placed on the 

 second stria. 



31. P. c u pr i p e nn i s , subtus aeneo-niger, capite thoraceque viridi-aureis, 

 nitidis, hoc latitudine breviore rotundato, margine tenui postice paulo latiore, 

 basi utrinque modice impressa, subtiliter rugosa, elytris thorace sesqui latioribus, 

 oblongo-ovalibus, fulgenti-cupreis, viridi late marginatis, subtiliter tripunctatis, 

 striis tenuibus, interstitiis planis. Long. *32 *36. 



iLec Agassiz' Lake Superior, 205. 



Feronia cupripevnis Say, Trans. Am. Phil. Soc. 2, 50. 



Agonum cupripenne Dej. Sp. Gen. 3, 139. Kirby, Fauna Bor. Am. 28. 



Abundant throughout the Middle and Western States; found also at Lake Su- 

 perior, and, according to Kirby, in lat. 54. A variety from Lake Superior has 

 the thorax and head and margin of the elytra greenish blue, and the disc of the 

 latter golden. 



A specimen from New York, given me by Mr. Guex, has the upper surface 

 green, somewhat darker, and tinged with purple on the head and thorax. 



D-g. 



A group containing winged species, in which the thorax is almost circular, 

 and finely margined, with the basal impressions deep, but very small like punc- 

 tures. The elytra are oval, truncate at base, slightly sinuate at tip, and mode- 

 rately convex ; the stria? are deep and punctured, the third interval has three im- 

 pressed punctures: the antennae at least in part are rufous. 



32. P. punctiformis, niger, nitidus, thorace rotundato, tenuiter margi- 

 nato, basi utrinque puncto maiusculo impresso, elytris thorace fere duplo latiori- 

 bus. convexis tripunctatis striis antice punctulatis, antennarum basi tibiis tar- 

 sisque rufis, femoribus saepe nigro-piceis. Long. *28 *36. 



Lee. Agassiz' Lake Superior, 206. 



Feronia punctijormis Say, Trans. Am. Phil. Soc. 2, 58. 



Agonum rufipes Dej. Sp. Gen. 3, 173. 



Agonum pun ct if or vie Say, Trans. Am. Phil. Soc. 4,423. 



Agonum foveicolle Chaudoir, Bull. Mosc. 1843, 764. 



Lake Superior, Pennsylvania, Georgia, Nebraska. Between the specimens 

 having the legs entirely red, and those having the thighs almost black, I can 

 perceive no difference of a specific nature. Mr. Chaudoir compares it with Ag. 

 lenum (Dej.,) but his description applies to no other but this species. 



