126 Proceedings of the Biological Society of Washingto7i. 



ently specific in value, since they are not correlated with trenchant 

 cranial or dental features. As nearly as can be determined by reference 

 to published figures Phyllomys brasiliensis Lund (1. c. ) is identical with 

 the earlier described species currently recognized as Loncheres armatus 

 (I. GeoflTroy). 

 Species of the genus Phyllomys will therefore stand as follows : 



Phyllomys armatus (I. Geoffroy). 



Mus hispidus Lichtenstein, Darstellung neu. o. wenig. bekannt. Saugeth. 



(p. unnumbered) Taf. XXXV, fig. 2, 1827-1834. (Said to be from 



Cayenne. ) 

 Nelomys armatus I. Geoffroy, Ann. Sci. Nat., Paris, ser. 2, X, p. 125, 



Aug. 1838 (new name for Mus hispidus Lichtenstein). 

 Phyllomys brasiliensis Lund (1. c). (East slope Serra do Espinhafo, 



Minas Geraes, Brazil. 

 Loncheres armatus Winge (1. c. ). (Brazil.) 



Phyllomys caniceps (Gunther). 



Loncheres caniceps Gunther, Proc. Zool. Soc. London, 1876, p. 745, pi. 73. 



(Medellin, Antioquia, Colombia). 

 [Isothrix] caniceps Trouessart, Cat. Mamm., 1897, p. 606. 



Phyllomys labilis (Bangs). 



Loncheres labilis Bangs, Am. Nat., XXXV, p. 638, August, 1901 (San 



Miguel Island, Panama). 

 [Isothrix] labilis Trouessart, Cat. Mamm., Suppl., 1904, p. 604. 



Phyllomys darlingi (Goldman). 



Isothrix darlingi Goldman, Smiths. Misc. Coll., Vol. 60, p. 12, September 

 20, 1912. (Marraganti, Rio Tuyra, eastern Panama). 



— E. A. Goldman. 



THE GENERIC NAMES EPIMYS AND RATTUS. 



The generic name Epimys Trouessart, 1881, for the Norway and black 

 rats and their allies, is antedated in the same sense by Rattus Fitzinger, 

 Sitz-ber. Akad. Wien, Vol. 56, pt. 2, p. 63, 1867; Rattus " S. D. W.," 

 Analyst, Vol. 4, p. 72, 1836; Rattus Donovan, Nat. Repos. , Vol. 3, pi. 

 73, text p. 1, 1834 [1827] ; and by Rattus (misprinted Ruttus) G. Fischer, 

 Das Nationalmuseum der Naturgeschichte zu Paris, Vol. 2, p. 128, 1803. 

 The name Epimys must therefore give way to Rattus Fischer, 1803, type 

 species Mus decumanus = Rattus norvegicus (Erxleben). While not vital 

 in this connection, it is interesting to note that the type species of Rattus 

 Donovan, 1827, is Rattus rattus (Linnaeus) by tautonymy, and not Rattus 

 donovani, a species of Arvicanihis (Lemniscomys). Donovan really 

 creates for the " rat tribe " a new genus Rattus, in which he includes, 

 besides the new species R. donovani, the old species Mus arvalis, M. 

 decumanus, and M. rattus. — N. Hollister. 



