﻿July, 1896.] 



NOMENCLATURE. 



17 



Faludicola Blasius, 1857 (Fauna cler Wirbeltli. Deutsclil., Bd. I, 

 Saugetbiere, p. 333), a subgenus o£ Arvicola (=z]\[icrotus), contained tlie 

 species: amphihius { = terrestris)j nivalis^ and ratticeps. As the first is 

 a member of the subgenus Arvicola and the others each a true Micro- 

 tus, the name can not be used. Moreover, it is i^reoccupied by Paludi- 

 co/« Wagler, 1830 (]^at. Sj^st. d. Amphibien, i>. 206, type Bu/o alhifrons 

 Spix). 



Agricola Bhisius, 1857 (1. c, p. 334), was proposed as a subgeneric 

 name for AUcrotus agrestis. The differences between this species and 

 the allies of M. arvalis are too sliglit to entitle the groups to rank as 

 distinct subgenera; but assuming that it were desirable to separate 

 them the name Agricola would be antedated by Mynomes Eafinesque, 

 1817, based on Microtus pennsyh' aniens^ a form whose superspecific 

 characters are exactly similar to those of M. agrestis. 



Pliaiomys Blyth, 1863 (Journ. Asiat. Soc. Bengal, XXXII, p. 89), is 

 the first and only tenable name proposed for the subgenus having 

 Microtus hJythi as the type. 



Ochetomys Fitzinger, 1867 (Sitzungsb. K. Akad. Wiss. Wien, LYI, 

 June, 1867, p. 47), included the water rats of Europe. It is thus 

 equivalent to Arvicola Lacepede. 



PraticoJa Fatio, 1867 (Les Campagnols du Bassin du Leman, p. 36), 

 is a subgenus of Arvicola (=Microius) containing: ampkihius { = terres- 

 tris), nivalis, arvalis, ratticeps, and campestris ( = arvalisf). As all of 

 these are species either of Microtus Sclirank, or Arvicola Lacei^ede, 

 the name Fraticola can not stand. Praticola is, moreover, preoccupied 

 in ornithology. 



' Sylvicola Fatio, 1867 (1. c, p. 63), based on Microtus agrestis is exactly 

 equivalent to Agricola Blasius, 1857. The name is preoccupied in ornith- 

 ology^, entomology, and conchology. 



Terricola Fatio, 1867 (1. c, p. 73), contained 2[icrotus suhterraneus and 

 M. savii. The name is, however, i)reoccupied in conchology by Terricola 

 Fleming, 1828. 



Isodelta and Anaptogonia Cope, 1873 (Proc. Am. Philos. Soc, XII, p. 

 87), are the tenable names for two extinct subgenera found in the Post- 

 pliocene cave deposits of Pennsylvania. Their types are Microtus 

 speothen and M. hiatidens, respectively. 



Pvotomys Cones, 1874 (Proc. Acad. Xat. Sci. Phila., p. 186), is the 

 tenable name for the genus of which Mus rutilus is the type. 



Micrurus Forsyth Major, 1876 (Atti della Societa Toscana di Sci. 

 Xaturali, III, fasc. I, p. 126), founded on Mina Palumbo's description of 

 Arvicola nehrodensis (a Pitymys), is preoccupied by 3Iicrura Ehrenberg, 

 1831, a genus of Vermes. 



Alticola Blanford, 1881 (Journ. Asiat. Soc. Bengal, L, pt. 2, p. 93), is 

 the only name proposed for the Asiatic subgenus with Microtus stolicz- 

 Tcanus as type. 



Eremiomys and Borioilion Polyakoff, 1881 (Mem. Acad. Imp. Sci. St. 

 16933— Xo. 12 2 



