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
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