TIarvest-Mouse and its Geographical Variafion.i. 529 



I. ^fus minutus tt/picus, P. S. Pallas, Nov. Spec. pp. 96 & 3i5 



{1779). 



Huh. Siberia. 



I have seen no specimen of this form. 



II. Mus minutus agilis (J. F. A. Dehne), Hoflossnitz, p. 16 



(1841). 



Hah. Northern Europe (specimens seen from Brunswick). 



Distinguishing characteristics. The upperside is not so red 

 as in Al. m. minimus, but th.e colour is uniformly distributed, 

 there being no contrast between the ramp and the upper 

 dorsal region ; the underside is strongly washed with yellow, 

 hence the line of demarcation between the colours of the two 

 surfaces is not so distinct as in M. m. minimus; the tail ex- 

 ceeds the combined length of the head and body ; the hind 

 foot seems to be larger than that of J/, m. minimus. Young 

 specimens have a duller and more muscuIus-Wke coloration 

 of the upperside, and in some cases a less richly tinted under- 

 side than the adults. 



The dimensions of an adult female (no, 85357*) reach (in 

 millimetres): — Head and body 68; tail 76; hind foot 16; 

 skull 18"5x8. The skull of a male (no. 85365*) reaches 

 18x8*5 millim, "^Ihese are the two largest of the thirteen 

 specimens from Brunswick ; but in all the teeth are unworn. 



III. AIus minutus campestris, A. G. Desmarest, Mamm., 

 Suppl. p. 543 (1822). For svnonymy see Ann. & Mag. 

 Nat. Hist., April 1899, p 345. 



Hah. Probably Northern France, Belgium, and Central 

 Western Continental Europe (specimens seen from Warenne, 

 Belgium). 



Distinguishing characteristics. As compared with M. m. 

 minimus the upperside is almost or quite as red in colour, 

 but of more uniform arrangement, the contrast between rump 

 and upper dorsal region being absent ; the underside is 

 yellower, but less so than in J/, m. agilis; the line of demar- 

 cation is only moderately distinct. 



The dimensions appear to be similar to those of M. m. agilis, 

 those of an adult suckling female (no. 86000 ■^) reaching : — 

 Head and body 65 millim.; tail 70; hind foot 16; skull 

 17x8. 



* The numbers refer to the labels of specimens in the collection of the 

 U.S. National Museum at Washington. 



Ann. & Mag. N. Hist. Ser. 7. Vol. v. 34 



