1854.] 55 



H h. 



A group containing two winged species, in which the thorax is rounded and 

 moderately large, finely margined, with the margin extending along the sides of 

 the base and very slightly thickened, but hardly reflexed. The elytra are not 

 much wider than the thorax, emarginate at base, hardly sinuate at the apex, and 

 have four and five punctures on the third interval. The antenna? and feet are 

 entirely black ; the upper surface is coppery. 



50. P.protractus, elongatus supra acneus, nitidus, thorace rotundato, 

 tenuiter marginato, basi truncata utrinque latius foveata et obsolete punctulata, 

 angulis posticis valde rotundatis, elytris thorace paulo latioribus, 4-punctatis, 

 interstitiis planis ; subtus cum antennis pedibusque aeneo-niger. Long. *33. 



Lake Superior, and Sandy Lake, Minnesota. The difference between this and 

 the next species is not well defined ; nevertheless, several specimens agree in 

 havins the thorax not wider than long, with the posterior angles more definite, 

 although much rounded ; the general form of the body is narrower. These dif- 

 ferences are not sexual, as of each form are found both males and females. 



51. P. c h a 1 c e u s, capite thoraceque supra aeneis nitidis, hoc rotundato, 

 tenuiter marginato, latitudine breviore, basi truncata, utrinque latius foveata et 

 obsolete punctulata, angulis posticis obsoletis, elytris thorace fere sesqui lati- 

 oribus, cuprascentibus, 4 vel 5-punctatis, interstitiis planis, subtus cum antennis 

 pedibusque aeneo-niger. Long. -33 *35. 



Lee. Agassiz' Lake Superior, 205. 



Agonum chalceum Lee. Ann. Lye. 4, 224. 



Sault Ste Marie, Michigan, not rare 5 a specimen also occurred in Nebraska. 

 Can Agonum enpreum Dej. (Sp. Gen. 5, 736,) be a variety of this or the pre- 

 ceding species, having but three elytral punctures? 



H-i. 



Winged species of moderately stout figure and variable color. The thorax is 

 broad and rounded, with the posterior angles obsolete ; the margin is fine and 

 slightly reflexed, the basal impressions are largp, rounded and shallow. The 

 elytra are deeply emarsjinate at base, very slightly sinuate at the apex ; the strias 

 are fine, and the intervals flat; the third interval has from 5 to 8 punctures. 



52. P. pi acid us, cyaneo-niger, subnitidus, thorace rotundato, latitudine 

 paulo breviore, margine fortius reflexo picescente postice paulo latiore, basi 

 utrinque late sat profunde foveata, elytris thorace sesqui latioribus, tenuiter 

 striatis, 5 7-punctatis, antennarum articulo lmo tibiis tarsisque piceo-testaceis. 

 Long. -337. 



Feronia placida Say, Trans. Am. Phil. Soc. 2, 43. 



Agonum morosnm Dej. Sp. Gen. 3, 145. 



Lake Superior, Maine, Illinois, New York, Georgia, Santa Fe. Readily recog- 

 nized by its greenish or bluish black color; the elytral punctures are usually six 

 in number, of which the two posterior are situated in the second stria, the others 

 on the third. Varieties occur having the legs of a uniform dull reddish color. 



53. P. maculicollis, rufo-testaceus, subnitidus, capite obscuriore, thorace 

 rotundato, latitudine breviore, margine tenui paulo reflexo, basi utrinque late 

 vix distincte impressa obsolete punctulata, macula discoidali magna obscura 

 ornato, elytris thorace sesqui latioribus, tenuiter striatis, 5 6-punctatis, nigris 

 margine lata ad humeros dilatata antennis pedibusque testaceis, abdomine nigro- 

 piceo ano testaceo. Long. 40 48. 



Agonum maculicolle Dej. Sp. Gen. 3, 175. 



Anchomenus maculicollis Mann. Bull. Mosc. 1843, 199. 



California, in every part west of the Sierra; the elytra are distantly and very 

 obsoletely punctulate ; of the punctures the two anterior are placed in the third, 

 the others in or near the second stria. The thorax is sometimes entirely testa- 

 ceous. By a strange error Count Mannerheim has added the word Ct apterus " to 

 the diagnosis, which he has otherwise copied almost literally from Dejean; the 



