APODEMUS gOy 



the latter may always be distinguished by their larger, smoothly 

 rounded brain-case (a character which persists to extreme old 

 age), relatively deeper rostrum, and larger teeth. 



Teeth. — In all respects, except for their slightly larger size, 

 the teeth resemble those of Apodemus sylraticus. 



Bemarls. — The large general size, long hind foot, and massive, 

 angular skull serve to distinguish adults of this species from 

 individuals of Apodemns si/lvaticus. Immature specimens are, 

 on the contrary, difficult to determine. The relatively limited 

 distribution of the large animal and the fact that it is not yet 

 known to occur on any of the small islands where A. sylvafims 

 has been found, are both circumstances which suggest the 

 probability that Apodemus flaijicoUis has entered western Europe 

 more recently than the small species. Members of the group 

 occur in the Himalayas ; but it is not known how much further 

 east their range extends. 



Apodemus flavicollis flavicollis Melchior. 



1834. Mus flavicollis ]\Ielchior, Deu Dauske Staats og Norges Pattedyr 

 p. 99 (Sielland, Denmark). ' 



1862. ? [^^us sijlvaticus] vrt. major Radde, Eeisen im Siiden von Ost- 

 Sibu-ien, i, p. 180 (Bureja Mountains). Part, specimens mentioned 

 from Crimea which are probably this form. 



1866. Mus cellarius J. F. Fischer, Zool. Gart., vii, p. 15.3, April, 1866 

 (near Luga, St. Petersburg, Russia). 



1874. Mus sijlvaticus Lilljeborg, Sveriges og Norges Ryggradsdjur, i, p. 263 

 (description based on the large animal). 



1894. Mus flavicollis de Winton, The Zoologist, 3rd ser. xviii p 441 

 December 1904 (part). 



1900. Mus sijlvaticus typicus Barrett-Hamilton, Proc. Zool. Soc, London 

 p. 404. Not Mus sijlvaticus LinocTus. ' ' 



1900. Mus sijlvaticus princeps Barrett-Hamilton, Proc. Zool. ,Soc., London 

 p. 408 (Busteuari, in the Carpathians, N.W. of Bucharest' 

 Roumania. Altitude 480 m.). Type in British Museum. ' 



1910. Mus sijlvaticus and M. sijlvaticus princeps Trouessart, Faune Mamm 

 d'Europe, pp. 149, 158. 



Type locality. — Sielland, Denmark. 



Geographical distribution. — Continental range of the species. 



Diagnosis. — White of underparts usually pure and without 

 much suffusion of slaty ; chest spot frequently not forming 

 complete collar. 



Measurements. — Four adults from Medelpad, Sweden : hind 

 foot, 25, 25, 25 and 26. Adult male and female from Hillerod, 

 Zealand, Denmark: head and body, 104 and 103; tail. 111 and 

 104; hind foot, 25 and 24; ear from meatus, 17 and 17-5. 

 Adult male from Nysted, Lolland, Denmark : head and body, 

 100; tail, 132; hind foot, 27. Average and extremes of five 

 adults from Caterille, Haute-Garonne, France : head and body. 



