1855.] . 351 



** Pedes rufi, antennarum articulis basalibus articulis basalibus haud carinatis. 



22. A. bas i 1 1 ar is , ovalis, brevior supra aenea vel nigra, thorace latitu- 

 dine r'up'o breviore aricrorsum angustato, lateribus rotundato, basi utrinqiie 

 parce punctata, et leviter bifoveata, elytris striis fortiter punctatis, interstitiis 

 subplanis pedibus runs, antennis palpisque piceis, ill is articulis 3 baseos rufis. 

 Long. -332. 



Say, Trans. Am. Phil. Soc. 2, 35 (Feronia) : ibid. 4, 428. 



Amara lucidtda Dej. Sp. Gen. 3, 477. 



Middle and Southern States. The strongly punctured elytral stria?, rufous 

 legs, and base of antennae will distinguish this species. Nevertheless, it seems 

 to vary in form ; one specimen from Massachusetts, given me by Dr. Harris, 

 is so much more corpulent than the others and so much more rounded on the 

 sides of the thorax that I am tempted to consider it as a distinct species. 



23. A. c halcea, ovalis, brevior, supra aenea, thorace latitudine duplo bres 

 viore antiorsum angustato, lateribus rotundato, basi utrinque parce punctata et 

 leviter bifovea.'a elytris striis haud punctatis, interstitiis planissimis, pedibus 

 antennisque rufis, his extrorsum vix obscurioribus. Long. -3. 



Dej. Sp. Gen. 3, 476. 



Middle and Sojthern States. Resembles in form the narrower specimens of 

 the preceding. Dr. Zimmermann has incorrectly placed it in his ninth division 

 of Celia, next to A. musculus (infra, No. 45). 



* * * Pedes nigri vel picei : antennae basi rufae, haud carinatae. 



24. A. impuncticol lis, ovalis supra aenea vel nigro-aenea, thorace 

 latitudine plus sesqui breviore antrorsum angustato, ad apicem profundius emar- 

 ginato angulis anticis paulo prominulis lateribus oblique rotundatis, pone me- 

 dium obsoletissime explanatis, postice vix obsoletissime foveato elytris striis 

 postice param profundioribus, antennis piceis, articulis 3 ferrugineis, femoribus 

 nigris, tibiis tarsisque lufo-piceis. Long. *2& 35. 



Say, Trans. Am. Phil. Soc. 4, 4^8. Kirby, Fauna Bor. Am. 39. Mannh. 

 Bull. Mosc. 1853. No. 33. 



Feronia impuncticol lis Say, Trans. Am. Phil. Soc. 2, 36. 



Amara trivialis\ Dej. Sp. Gen. 3, 464. 



Amara anthracina Bald. Proc. Acad. Nat. Sc. 1, 300. 



Amara difficilis Lee. Ann. Lye. Nat. Hist. 4, 362 (spec, decolo^atum). 



Middle and Western Siates to the Rocky Mountains; also in Russian Ame- 

 rica, according to Mannerheim; very closely resembles A. fallax, below 

 described, but the third joint of the antennae is not at all carinated : the flatten- 

 ing of the sides of the thorax is a deceptive c'.iaiacter, and is sometimes hardly 

 visible. From the following four species it differs by the t'lorax being more 

 deeply emarginate at the apex, with the angles more prominent. 



25. A. littoralis, ovalis, paulo longior, supra aenea, thorace latitudine' 

 fere duplo breviore, antrorsum angustato, lateribus rotundatis, angulis anticis 

 haud prominulis, basi utrinque vix bifoveata, elytris striis impunctatis, postice 

 haud profundioribus, pedibus totis nigris, antennis piceis articulis tribus baseos 

 rufis. Long. 3. 



? Mannerheim, Bull. Mosc. 1853,207. 



Sitka. The thorax is shorter, more suddenly and less obliquely rounded on 

 the sides rather than in the preceding species, which it otherwise resembles in 

 form. Mannerheim's description does not at all agree with the typical speci' 

 men sent to me bv Baron Chaudoir. 



26. A. i n e p t a , ovalis paulo longior, supra aenea, thorace latitudine fere 

 duplo breviore, antrorsum angustato, lateribus rotundatis, postice subexplanatis, 

 angulis anticis haud prominulis, basi utrinque leviter bifoveato> elytris striis 

 postice haud profundioribus, pedibus rufo-piceis, antennis piceis, articulis tribus 

 baseos rufis. Long. -29. 



A specimen collected in Oregon by the the late J. K. Townsend was given 

 me by Mr. Wilcox as having been determined at the Berlin Museum for A. 



