•)0 Proceedings of th,e Biologind Societg of Washington. 
Ill size and <feneriil appearance tlie Manclinrian animal resembles Apo- 
demus nigritalus Flollister from the Altai Mountains. It is distin{>;nishable, 
liowever, by longer ear and by less conv'ex dorsal profile of skull. 
Epimys norvegicus socer subsp. nov. 
Type.—Adult male (skin and skull) No. 144,020, U. 8. National IMu- 
seum. Collected at Taocheo, Kansu, China, January :50. 1905, by AV. \V. 
Simpson. Original No. 5. 
Diagnosis. Like Manchurian specimens of Epimys norvegicus caraco 
(Palla4) but color paler, essentially as in the palest European specimens 
of E. norvegicus norvegicus. the difference between the two races about 
the same as that betw’een ^^us ivagneri mongolicus and M. tvagneri 
manchu. 
Color.—-Type: upperparts a dull huffy gray noticeably “ lined ” by the 
longer blackish hairs, the median region from crown to base of tail with 
a slaty tinge, the sides clearer buff (between tlie cream-buff' and cartridge- 
bnff of Kidgway); underparts buff like that of sides but without inter¬ 
mingling of dark hairs, the slaty under color appearing irregularly at 
surface: feet and underparts of tail light cartridge-buff, dorsal surface of 
tail sharply contrasted dark brown. Three immature individuals essen¬ 
tially like type but with slaty dorsal area broader and more diffu.se. 
Measurements.—Type (teeth moderately worn): head and body, 200; 
tail, ].‘)0; hind foot (dry), iJS; hind foot without claws (dry), 36; condy- 
lobasal length of .skull, 45.1; zygomatic breadth, 23.9; interorhital con¬ 
striction, 6.7; breadth acro.ss postorbital angles, I].:!; least breadth 
across ridges at level of interparietal, 10.6; occipital breadth, 18.5; 
occipital depth, 11.6; nasal, Ki.9; diastema, 12.5; mandible, 27.5; max¬ 
illary toothrow (alveoli), 7.7; mandibular tootbrow (alveoli), 7.3. 
Specimens e.ramined.—Eight, from the following localities: Taocheo, 
Kansu, 4; Yu-ling-fu, Shensi, 1; twelve miles south of Yen-an-fu, 
Shensi, 3. 
Remarks. —AA ith the exce})tion of one specimen, a young-adult female 
(teeth slightly worn) from 12 miles south of Yen-an-fu, the series is very 
uniform. In this individual the color is so decidedly paler that the 
animal appears at first glance to be a pallid exam])le of Epimys confu- 
cianus luticolor. It is probably abnormal as the others from the same 
jfface show no peculiarities. Taking the seven normal specimens as a 
whole the Chine.se race is readily distinguishable from Epimys norvegicus 
caraco, as repre.sented by six skins from Kirin Province, 3Ianchuria, by 
characters which closely parallel those distinguishing the local forms of 
Mus occurring in the same regions. 
The exact agreement of some of the not fully adult Kirin specimens 
with Pallas’s account convinces me that tbe Manchurian and Ea.st Sibe¬ 
rian repre.sentative of Epimys norvegicus is the original ''Mus caraco'' 
as suggested by Thomas in 1909.* Kasbtschenko has, however, recorded 
his opinion to tbe contrary and has iiroposed tbe new subsi)ecitic name 
* Ann. and Map. Xat. Hist. sor. s, Vol. 1, p. 502. De(‘oni))er, 1909. 
