378 MURID.E 



II. Size smaller ("mice," with head and body not 

 exceeding 130, hind foot rarely reaching 27 

 mm.) : — 



1. Tail bushy, colour brownish-yellow . .| avellanarius. 



2. Tail scaly or sparsely haired, not bushy : — 



(A) Tail distinctly less than half as long ^^XjirrrROTUS 

 head and body . . . ./ 



(a) Size smaller (head and body averaging! 



100, hind foot 16-18 mm.), co\oVit\M. hirtus. 

 brighter (back in extreme cases rufous)J 



(b) Size larger (head and body 110-125, 



hind foot 18-20 mm. : — 



(a') Colour brownish . . . M. agrestis. 



(a) Upper parts with decided tinge\ J/! a. neglectus 



of russet . . ./ (Scottish Highlands). 



(b) Upper parts without tinge of 



russet : — 



(a') Under parts washed"! 



with wood brown (the ,, , 



hair-bases concealed): y /tt u -j \ 

 coat thick (hairs of (Hebrides), 



back 13 mm.) .J 



(b') Under parts dusky (the' 

 slaty hair-bases taking 

 part in the general 

 coloration) ; coat thin 

 (hairs of back 8 mm.) 



M. a. macgillivraii 

 (Islay). 



(b') Colour above rich brown, beneath\^. orcadensis (South 

 buff . . . ./ Orkney Islands). 



(c') Colour above greyish-brown, be-) ^ mndavensis 

 neath buffy-grey . .J^' •^^«'^'y«''-f"- 



(a) Colour paler, back light "hair\7l/". s. sandayensis (San- 



brown" . . ./ day Island, Orkneys). 



(b) Colour darker, back dark " h.xa\M. s. westra (Westray 



brown" . . ./ Island, Orkneys). 



(B) Tail about half as long as head and body E VOTOMYS. 



(a) Size smaller (head and body qo-ioo,~\ „ , 1 1. u 



hind foot 15-4-1 7 mm.), colour deeper ]^-Sl^^^olus brttanmcus. 



i5'4-i7 mm.), colour deeper / 



r (head and body 100- no, 

 18-19 mm.), colour brighter. 



(c) Size as in skomerensis, colour as in 



(b) Size larger (head and body \oo-\\o,\E. skomerensis i^\av!\.t\ 

 hind foot 18-19 mm.), colour brighter ./ Island). 



bize as in skomerensis, colour as inl _ , , . ,,, ,,\ 

 glareolus . . . .|^- '^^^^''"^ (^uH). 



