356 [June, 



leviter bifoveata, elytris tenuiter striatis, antennis palpis pedibusque rufis. 

 Long. '25 *3. 



Dej. Sp. Gen. 3, 475. Mannerh. Bull. Mosc. 1843, 209. 



Celia a/oata Z\mm.\oc. cit. 



San Francisco and San Diego, California, not rare. 



The following species are unknown to me, or from the want of detail in the 

 characters given cannot be safely referred to any of those above described. The 

 two first mentioned are common European species, said to occur on this conti- 

 nent. 



A. s p r e t a Dej. fide Zimmerman, Silberm. Rev. Ent. 2, 203. 



A. vulgaris L'atr. (Linne, Carabus), fide Kirby, Fauna Bor. Am. 38. 



A. hyperborea Dej. Sp. Gen. 5, 800. Labrador; (belongs probably to 

 Div. b.) 



A. d i s c o r s Kirby, Fauna Bor. Am. 40. 



Curtonotus rufimanus Kirby, ibid. 35. Probably a variety of A. 1 a t i- 

 c o 1 1 i s Lee, in which case the name will not have preference, as the descrip- 

 tion must be considered worthless, and moreover must be considered as errone- 

 ously separated from A. convexiuscula Kirby. 



Curtonotus brevilabris Kirby, and C. 1 a t i o r Kirby ibid. 



Isopleurus nitidus Kirby, ibid. 50, tab. 1, fig 6. Found in the Rocky 

 Mountains ; may be either A. septentrionalis (No. 16), or A. subcenea (No. 45.) 

 At all events the name cannot remain, there being already an A. nit id a 

 Sturm found in Europe. 



Bradytus g 1 a c i a 1 i s Mannerh. Bull. Mosc. 1853. Arctic western Ame- 

 rica. 



Celia indistincta Mannerh. ibid. Unalaska ; seems related to A. g i b b a 



Lee. 



Celia a m pi i c o 1 1 i s Mannerh. ibid. 



The following European species have been mentioned, probably erroneously, 

 by Dejean as having been found in the United States : A communis, familiaris, 

 and similata. 



Amara ? grossa Say, Trans. Am. Phil. Soc. 4 430, does not belong to 

 the genus, but is probably a Nothopus. 



Feronia impunctata Say, quoted by Dejean, (Sp. Gen. 3, 469) as synony- 

 mous with A. familiaris, belongs to Prisfodactyla. Dejean was misled by .n 

 incorrectly named specimen received from Say. 



Synopsis of the Hydrophilid;e of the United States. 

 By John L. Le Conte, M.D. 



The species of th ; s family seem to have been treated with undeserved neglect, 

 and in fact there is in their general appearance a sameness, and in the parts of 

 the body where, specific characters are usually to be seen, a uniformity of structure 

 which does indeed tend to render the study of them very monotonous : yet on 

 comparing portions of the body not usually seen, the sternum and adjoining 

 parts, differences will be found in many cases, which if not associated with the 

 closest resemblance in form and manner of life would determine the formation 

 of a large number of genera. Nevertheless the genera, as evidenced by external 

 character, appear separated by characters of still greater magnitude, as may be 

 seen from the following scheme of our native genera which is partly arranged 

 from the excellent labors of Lacordaire (Genres des Coleopteres, 1, 448 and sq.) 

 I have merely replaced some of the characters by those given by Erichson, and 

 have suppressed Volvulus and Tropisternus ai being founded on insufficient 

 characters, and inverted the order of some of the primary divisions. 



I. Tarsi posteriores articulis 4 primis brevibus, a'qualibus Spercheus. 



IT. Tarsi posteriores articulis 4 primis brevibus, lmo indistiricto (Helophokides.) 

 Palpi maxillares articulo ultimo longiore : oculi integri. 



