1854.] 59 



Anchomenus ovipennis Mann. Bull. Mosc. 1843, 196. A. rotundipennis 

 Motsch. Bull. Mosc. 1845, part 2, 340. 



Anchomenus rugiceps Mann. Bull. Mosc. 1843, 196. A. ovipennis Motsch. 



1. cit. 2, 339. 



Anchomenus m a u r u s Motsch. Bull. Mosc. 1845, 2, 339. 



Anchomenus brunneo-marginatus Mann. Bull. Mosc. 1843, 196. 



Anchomenus ferruginosus Dej. Sp. Gen. 3, 128. Mann. Bull. Mosc. 

 1843, 197. 



Agonum brevicolle Dej. Sp. Gen. 3, 159. Anchom. brevicollis Mann. Bull. 

 Mosc. 1843, 199. 



Agonum f a m e 1 i c u m Menetries, Bull. Petrop. 2, 58. 



From Russian. America. 

 Agonum mol 1 e FJsch. Mem. Soc. Imp. Mosc. 6, 102. Fischer, Ent. Ross. 



2, 125, tab. 19, fig. 2. Anehom. mollis Dej. Sp. Gen. 3, 129. Mann. Bull. Mosc. 

 1843, 198. 



Agonothorax planipennis Motsch. Kafer Russl. (Carab.) 68. 



From Atlantic America. 



Anchomenus elongatulus Dej. Sp. Gen. 3, 112. 



Agonum n i t i du 1 u m Dej. Sp. Gen. 3, 143. 



Agonum c u p r e u m Dej. Sp. Gen. 5, 735. 



Agonum a 1 b i c r u s Dej. Sp. Gen. 3, 158. 



Agonum sordens Kirby, Fauna Bor. Am. 25. 



Agonum seminitidum Kirby, Fauna Bor. Am. 26. 



Agonum simile Kirby, Fauna Bor. Am. 27. 



Agonum af f i n e Kirby, Fauna Bor. Am. 27. 



Feronia maculifrons Say, Journ. Acad. Nat. Sc. 3, 116, (vide Platynus 

 cincticollis, sup. p. 43.) 



Feronia scutellaris Say, (Journ. Acad. Nat. Sc. 3, 146) is a diseased specimen 

 of one of our black species, allied to P. melanarius. 



Anchomenus pubescens Dej. (Sp. Gen. 3, 122) of which Anch. obconicus 

 Eald. (Proc Acad. 1, 299) is a synonym, does not belong to this group, but 

 forms a genus A t r a n u s Lee. (Ann. Lye. 4, 438,) allied to Chlaenius. 



The European Platynus angust icollis Dej . is mentioned by Kirby (Fauna 

 Bor. Am. 23) as being found on this continent in lat. 54 and 65; his descrip- 

 tion seems to apply to one of the species of division (B a,) and probably to 

 P. marginatus ; a comparison of specimens is, however, desirable in order to es- 

 tablish the synonymy. 



Descriptions of nexv genera and species of North American Frogs. 



By Spencer F. Baird. 



HYLAD.E. 



Teeth in upper jaw. Abdomen granulated. Two outer metatarsals, firmly 

 united throughout by muscle and ligament. 



1. Acris crepitans, Baird. Brownish above. The median region of head and 

 body above bright green : a dark triangle between the eyes. Three oblique 

 blotches on the sides, nearly equidistant; the first behind the eye, the last on 

 the Hanks and running up on the back; all usually margined with lighter. A 

 narrow white line from the eye to the arm. Beneath yellowish white. Inferior 

 face of thigh plain. Tibia a little more than half the length of the body; foot 

 rather smaller. Head rather obtuse, scarcely longer than broad. Web of hind 

 foot extending to the penultimate articulation of the 4th toe. 



Syn. Hylodes gryllus, De Kay, N. Y. Zool. III. (1842.) 70, PI. xxii. f. 61. 

 Ilab. Northern States generally. 



2. Acris acheta, Baird. Slender. Tibia two-thirds the length of body. Color 

 above dark brown ; blotched much as in Acris gryllus. Beneath white, closely 



