548 MURIDAZ—APODEMUS 
ventral surface usually of a pure white colour; its pectoral spot is often 
not sufficiently developed to form a complete collar. The other is the 
British A. f, wzntonz, described below. Collett says that in the form 
living in southern Norway the reddish-yellow pectoral belt is seldom 
wanting, and that it is often prolonged in a short point down towards 
the belly; this race would thus appear to make a closer approach 
towards the British form than do the specimens from Central 
Europe. 
The British sub-species is :— 
DE WINTON’S FIELD MOUSE. 
APODEMUS FLAVICOLLIS WINTONI (Barrett-Hamilton). 
1g00. MUS SYLVATICUS WINTONI, G. E. H. Barrett-Hamilton, Proc. Zool. Soc., 
London, 1900, 406; described from Graftonbury, Herefordshire ; type specimen, 
a male, No, 0.3.12.1 of British Museum collection; Trouessart ; Johnston ; 
Millais. 
1894. MUS FLAVICOLLIS, de Winton, Zoologist, 441, December ; Lydekker. 
1912. APODEMUS FLAVICOLLIS WINTONI, Miller, Ca¢alogue, 831. 
History :—Pennant (Quad, ii., 184, ed. 3, 1793)! states that the 
“Field Rat” has the “breast of an ochre colour; belly white; length, 
from the tip of the nose to the tail, 44 inches; tail, 4 inches”; this 
description appears to have been based upon a specimen of the present 
form, and not upon sy/vaticus. Similarly, the dimensions given by 
Shaw, Desmarest, and Bell (ed. 2, 296) appear to be derived from 
wentonz, and most of the older writers seem to have regarded this 
mouse as a full-grown or finely developed sylvaticus. Jenyns (Jan. 
Brit. Vert., 31, 1835), however, called specific attention to “a larger 
variety, measuring 44 inches in length, exclusively of the tail, which is 
4 inches,” sometimes met with in woods. The history of modern know- 
ledge of this form, dating from de Winton’s paper of 1894, has been 
dealt with above under the species. 
Distribution :—This mouse is only known from South Britain, in 
which it appears to have a wide but sporadic distribution. Originally 
described from Herefordshire and Northamptonshire, it is now known 
to occur at various localities in Sussex, Surrey, Kent, Middlesex, Essex 
(Dr H. Laver and G. Dalgleish, zz /2.), Suffolk (Southwell, Zoologzs¢, 
1903, 150), Northumberland, Worcestershire (Pocock, Journ. ctt., 1901, 
423), Cornwall, Shropshire, near Oswestry (Dumville Lees in Forrest), | 
Brecon (at Llyswen, Phillips), and Denbigh (Llanrwst, Forrest, Vorth 
Wales, 50). 
Where present this mouse is usually abundant, its colonies being, if 
1 Also in Brit. Zool., ed. 1 (folio), 1766, 49. 
