DE WINTON'S FIELD MOUSE 



DIMENSIONS IN MILLIMETRES— coH/wa^af;— 



551 



Head and 

 body. 



Tail (with- 

 out naiis). 



Hind foot 



(without 



claws). 



Ear. 



Weight 

 In 



grammes. 



Sexhallt Mature Females : — 



Caught and measured by L. K. Adams at 

 Beigate, Surrey— 



1. 80th Dee. 1904 



2. 24Ch Aug. 1906 



8. 22nd July 1909 



i. 10th Oct. 1911 



Ludlow, Salop— 



6. iBt March 1918 



Herefordshire (W. B. de Winton, Zoologist, 



1896, p. 870) 



Do. do. 



Do. do 



Norton, Worcestershire (E. I. Pooock, 



Zoologist, 1901, p. 423), in spring . 

 South Herefordshire (G. A. Burney), 28th 

 March 1914 



Average of 10 



Qraftonbury, Hereford : average and ex- 

 treme measurements of 6 adults of both 

 Bexes ; Miller, Catalogue': — 



Minimum 



Maximum 



Average 



100 

 85 

 90 

 94 



105 



lOS 

 110 

 115 



108 



101 



102 

 115 



100 



9S 



104 



108 



107 



108 

 115 

 112 



114 



100 



107-6 



23 



24 

 22 

 23 



24 

 23 

 24 



23-2 



23 

 25 



16 



17 



18 

 13 

 18 



19 



15-6 



16-5 



17 

 19 



17-6 



312 

 313 



1 6 embryos. 



2 Suckling. 



3 Perforate ; practically mature. 



O'lrt/ I 



Habits : — The general habits of this mouse are, no doubt, like those 

 of sylvaticus. Not infrequently, however, it takes up an abode in houses. 

 Thus Mr Adams says that it " occasionally frequents buildings " ; Dr H. 

 Laver informed us of four 

 that were killed in a store- "'"^ 

 room at Colchester in 1904; 

 Mr G. Dalgleish {in lit.) de- 

 scribes three females caught 

 in a storeroom in his house 

 at Midhurst, Sussex, early 

 in November 1910, and he 

 states that in the winter of 

 1909 a number were taken in 

 an outhouse, where potatoes 

 were stored, at Godalming, ^^^_ ^^_^_ f_ „,„,„„,■, dissection of Uterus, 

 Surrey. Lastly, Mr J. F. showing Superfcetation. (L. E. Adams.) 

 Davison sent three caught 



on 26th February 191 3 in a ground-floor room, used as a larder, in 

 his house at Ludlow, Shropshire ; he mentions {in lit.) that he had 

 also caught this mouse, together with Microtus hirius, in the cellars ; 

 that in one part of his stables wintoni abounded, while next door, and 



