Osgood Unrecognized and Misapplied Names. 49 



Synaptomys borealis (Richardson). 



Arricola borealis Richardson, Zool. Jonrn., Ill, p. 517, 1828; Fauna Boreali- 

 Americana, p. 127, 1829; And. and Bach., Quad. N. Am., Ill, p. 134, 

 pi. CXXIX, 1854. 



Richardson's descriptions of Arvicola borealis are very complete and even 

 accompanied by the significant statements : " It may, however, be consid 

 ered as an intermediate link between the two subdivisions of the genus 

 arricola, and may without inconvenience be ranked either as a true 

 meadow-mouse or as a lemming" ; and, " the thumb of the forefeet con 

 sists merely of a small strap-shaped nail." Later Audubon and Bachman 

 published further descriptions and a colored figure based upon an exami 

 nation of Richardson's original material. Yet recent authors have been 

 unable to assign the name satisfactorily. It has usually been supposed to 

 refer to the genus Microtwfi but the type, No. 42. 10. 7. 10 British Museum, 

 is a characteristic example of the genus Synaptomys, subgenus Mictoinys. It 

 bears an early label with the following data : "Arvicola boreali*. Mouse 

 A. 42. 10. 7. 10. See p. 12. Note book. Awinnak, Dog-ribs. 4 inches 

 long exclus. tail. Fort Franklin. Dr. R." The skin is in fair condition 

 and shows a well developed pair of the characteristic .whitish rump 

 patches. The fragments of the skull which were removed from the skin 

 for my examination include the nasals and grooved upper incisors, some 

 of the lower molars, and the upper molars of the right side. Measure 

 ments of these fragments are : Length of nasals, 7.5 ; palatine slits, 5.1 ; 

 alveolar length maxillary toothrow, 7.7 ; crowns of maxillary toothrow, 7.2. 



Peromyscus polionotus (Wagner). 



Mus polionotus Wagner, Archiv. f. Naturg. v. Wieg., II, p. 52, 1843. 

 Peromyscus subgriseus arenarius Bangs, Proc. Bost.Soc. Nat. Hist., XXVIII, 



pp. 202-293, 1898 not P. eremicus arenarius Mearns, 1896. 

 Perornyscns subgriseus ballolus Bangs, Science, N. S., VIII, pp. 214-215, Aug. 



19, 1898 Hursman Lake, Georgia. 



The type of this species is a fairly well preserved mounted specimen in 

 the Natural History Museum (Universitiit Institute und Sammlungen) at 

 Zurich, Switzerland. Its identity as a member of the group of small mice 

 containing the forms well known under the names subgriseus and nivei- 

 ventris is obvious. It is said to have come from Georgia and its color, which 

 is not greatly changed by exposure, agrees well with recently collected 

 specimens from that region. 



Reithrodontomys humulis Bachman. 



Mus humulis (Bachman) in Aud. and Bach., Proc. Acad. Nat. Sci., Phila., 



pp. 97-98, 1841. 

 ?? Mus carolinensis Aud. and Bach., Journ. Acad. Nat. Sci., Phila., p. 306, 



1 842. 

 Mas lecontii Aud. and Bach., Journ. Acad. Nat. Sci., Phila., p. 307, 1842. 



fCf. Rhoads, Proc. Acad. Nat. Sci. Phila., pp. 28n-286, 1894; Miller and Rehn, Proc. 

 Bost. Soc. Nat. Hist., XXX, p. 116, 1901. 



