8 ME. OLDFIELD THOMAS ON [Jan. 14, 



certain amount of geogTaj)liical variation, although this is obscured 

 by the individual variation in size and the development of the 

 dorsal stripe already referred to in previous papers of the 

 present series. 



The following synopsis indicates the local races into which the 

 eastern forms of A. agrarius apjDear to be divisible : — 



A. (Northern.) 



a. Colour dark — more or less tawny. Belly hairs washed with 



pale tawny. Dorsal streak well developed. 



Mantchuria. A. a. mantcliuricus Thos. 



b. Colour less rich — approximating to " cinnamon." Belly hairs 



white- tipped. Dorsal streak variable. 



Korea and Quelpart. A. a. corece, subsp. n. 



B. (Southern.) 



c. Colour comparatively greyish — .approaching wood-brown, the 



head and fore quarters lighter than the back. Dorsal streak 



always present Shantung Peninsula. A. a. pallidior, subsp. w. 



d. Colour more uniform and brownish. Dorsal streak usually 



obsolete Nanking to N.W. Fokien. A. a. ningpoensis ^wmh. 



The two forms now given new names may be briefly described 

 as follows : — 



Apodemus agrarius core^. 



Summer pelage more or less spiny. General colour above 

 approximating to " cinnamon " of Ridgway, not so ruddy as in 

 mantchuricus, more so than in ])cdlidior. Belly hairs grey basally, 

 white terminally, not washed with tawny or buflfy. Dorsal streak 

 variable, but never of the clear well-defined unspeckled black 

 throughout usually characteristic of true agrarius. 



Dimensions of four specimens from the typical locality : — 



Head&body. Tail. Hind foot. Ear. 



mm. mm. mm. mm. 



S 91 81 21 13-5 



$ (Type)... 110 95 20-5 13 



2 103 81 21 14 



$ 95 80 21 13-5 



Skull (of type) — greatest length 27"5 mm. ; basilar length 22 ;: 

 length of vipper molar series 3"8. 



Rah. Korea and Quelpart. Type from Min-gyong, 110 miles 

 S.E. of Seoul. 1000'. 



Type. Adult female. B.M. No. 6.12.6.74. Original number 

 654. Collected 24th Nov. 1905. 



The • two series of this form obtained by Mr. Anderson are 

 enumerated in the papers on the Korean collections. 



Apodemus agrarius pallidior. 



Size perhaps averaging rather less than in the more northern 

 forms. Fur not sj)iny, but no specimens seen dated later than 

 May 10. General colour above paler and more greyish-white 

 than in the allied forms, especially on the head and across the^ 



