﻿18 



NORTH AMERICAN FAUNA. 



[Xo. 12. 



Petersbourg, XXXIX siippL, p. 34), based, respectively, on Miis laguriis 

 Pallas and Mns torquatus Pallas, are synonyms of Lagurns Gloger and 

 Dicrostonyx Gloger. 



Xeofiher True, 1884 (Science, lY, p. 34), was described as a genus 

 with N. alleni, the only known species, as type. Eecently it has been 

 shown that the characters of the animal are not enougli to separate it 

 generically from MicroUis, of which, however, Neofiher forms a well- 

 marked subgenus.^ 



Lasiopodomys Lataste, 1887 (Annali del Mus. Oiv. di Storia Xaturale 

 di Genova, ser. 2a, Yol. lY, p. 268), is a synonym of Fhaiomys Blyth, 

 1863, the species on which the two names were based, Microtus hyandti 

 Eadde and Microtus hlytki Blanford { = M. leuciirus Blyth nec Arvicola 

 leucurus Gerbe), respectively, being in no wa}^ separable subgenerically.^ 



Fheuacomys Merriam, 1889 (Xorth Am. Fauna, Xo. 2, p. 28), is the 

 tenable name for the genus of which Phcnacomys iniermedius is the type. 



Campicola Schulze, 1890 (Schriften Xaturwiss. Yereins d. Harzes in 

 Wernigerode, Y, p. 24), is a subgenus formed for the reception of the 

 species Microtus arralis, M. suhterraneus, and M. campestris. It is 

 thus a compound of two subgenera, Microtus {arvalis and campestris) 

 and Fitymys [suhterraneus], each of which has previously received a 

 tenable name. Campicola is, moreover, preoccupied in ornithology 

 (Swainson, 1827). 



Bramus Pomel, 1892 (Gomptes Eendus, Paris, CXIY, p. 1159), is 

 based on a mandible and the teeth of both jaws of a rodent from the 

 Quaternary phosphorites of Trara de Xedroma near Ain-Mefta, Tunis. 

 Although the author compares this fossil with the bones and teeth of 

 the water rat, he points out such striking differences between the two 

 that it is very doubtful whether Bramus can be considered a member 

 of the subfamily Microtince. (See p. 73.) 



Aulacomys Ehoads, 1894 (American Naturalist, XXYIII, p. 182), 

 although based on an abnormal specimen, is the tenable name for a 

 group of American water rats, should tbe latter be considered sub- 

 generically distinct from Arvicola. The peculiarities of the original 

 sxiecimen of Microtus arricoloides, the type of Aulacomys, are such that 

 the group was originally given full generic rank. 



Mictomys True, 1894 (Proc. U. S. Xat. Museum, XYII, Xo. 999, 

 p. 242, Advance Sheet, April 26), was proposed as a full genus with 

 Mictomys innuitus True for the type and only known species. The name 

 is tenable, but the group is only a subgenus of Synaptomys? 



Tetramerodon Ehoads, 1894 (Proc. Acad. Xat. Sci. Phila., p. 282), is 

 the most recent synonym of Microtus. The author, as Blasius had 



^True, Report of the Smithsonian Institution for 1884, Part II, pp. 325-330, PI. II 

 Merriam, North American Fauna, No. 5, p. 60, 1890. Chapman, Bull. Am. Mus. Nat 

 Hist., New York, YI, p. 334, 1894. 



2 See Actes de la Societe Scieutifique du Chili, lY, p. CLXXXYIII, 1894. 



3 See Merriam, Proc. Biol. Soc. Washington, X, p. 57, 1896. 



