348 [June, 



deep, are more distinctly bistriate ; the thorax is also less narrowed towards the 

 base, and the elytra are less flattened on the disc. I have changed the name on 

 account of Curtonotus rufimanu s Kirby, Fauna Bor. Am. 35. 



8. A.melanogastrica oblonga, nigro-picea, supra subaenea, thorace lati- 

 tudine sesqui breviore, postice paulo angnstato, lateribus rotundatis ad basin bre- 

 vissime subsinuatis, anguiis posticis rectis haud prominulis, ad apicem et basin 

 punctato, impressionibus basalibus minus profundis bistriatis, carina externa 

 latiore; elytris thorace vix latioribus dorso minus convexis, striis crenulatis 

 minus distincte versus apicem, antennis rufis, pedibus rufo-piceis, postpectore 

 punctato. Long. *44. 



Dejean, Sp. Gen. 3, 519 ; Mannh. Bull. Mosc. 1843, 210; ibid. 1852. 



Leirus melanogastricus Zimm. Gistl's Faunus, 1,38; Silberm. Rev. Ent. 2, 

 229. 



Russian America; a specimen sent by Mr. Motscbulsky. This species re- 

 sembles precisely in its form the preceding, but the basal impressions of the 

 thorax are less deep and more distinctly bistriate, and the external carina is 

 broader and less acutely elevated: the sides of the thorax are also somewhat 

 less rounded. 



9. A. Eschscholtzii, oblonga nigro-picea, supra subaenea, thorace latitu- 

 dine plus sesqui breviore, postice angustato, lateribus magis rotundatis postice 

 brevissime sinuatis, anguiis postis rectis vix prominulis, ad apicem et basin 

 punctato, impressionibus basalibus modice profundis bistriatis, carina externa 

 latiore; elytris parallelis convexiusculis, striis crenulatis, minus distincte ad 

 apicem ; pedibus nigris, antennis piceis, articulis duobus primis rufis. Long. 

 39. 



Leirus Eschscholtzii Chaudoir, Bull. Mosc. 1S37, 7, 36. 



Sitkha ; a specimen received from Baron Chaudoir. Very similar to the pre- 

 ceding, but with narrower, more parallel, and more convex elytra ; the thorax 

 is broader and more rounded on the sides, and the basal impressions are less 

 distinctly bistriate ; the antennae are broken in my specimen, only two points 

 remaining ; these are rufous, but the others are described as being dark colored : 

 the feet are entirely black, and the postpectus is punctured. 



I have omitted the reference to Mannerheim's description, because he states 

 that the sides of the thorax are rounded to the base, while in the specimen before 

 me they are as much sinuated as in A. melanogastrica, and because I have re- 

 ceived from Mr. Motschulsky, under the same name, a specimen in which the 

 sides of the thorax are not at all sinuous, and the feet are rufous, as described 

 by Mannerheim. 



10. A. o b t u s a , oblonga, nigro-picea, supra vix aenescens, thorace latitudine 

 plus sesqui breviore, postice angustato, lateribus rotundatis, postice obliquis 

 haud sinuatis, anguiis posticis obtusis, ad basin punctato, utrinque foveis duabus 

 confluentibus notalo, carina externa latiore; elytris thorace haud latioribus, 

 convexis parallelis, striis crenulatis minis distincte ad apicem, pedibus rufis, an- 

 tennis nigro-piceis articulo lmo solo rufo. Long. *36. 



Amara Eschscholtzii\ Mannerheim, Bull. Mosc. 1852, No. 13. 

 Russian America ; Mr. Motschulsky. Very different from all the preceding, 

 and somewhat approaching by its form some species of the next divisions. 



11. A. elongata, elongata, oblonga-ovato, gracilis, rufo-picea (immatura?), 

 thorace latitudine non breviore, quadrato, antice posticeque modice angustato, 

 lateribus rolundato, anguiis posticis paulo obtusis, basi utrinque bistriato et 

 punctato, carina externa latiore parum elevata; elytris thorace latioribus, 

 tenuiter striatis, striis antice subtiliter punctatis. Long. -4. 



Curtonotus elongatus Lee. Agassiz' Lake Superior, 207, tab. 8, fig. 5. 

 One male found floating in Lake Superior, near the northern shore. This 

 species differs very much in its form from all others known to me. 



c. BRADYTUS Zim. 



12. A. e x ar at a, oblongo-ovalis, latiuscula nigro-picea, thorace latitudine 

 fere duplo breviore, antice posticeque paulo angustato, lateribus rotundatis, an- 



