52 TARID-E. 



sooty or even brownish black, this colour extendingsomewhat further 

 down on the hind neck than in P. palustris : general colour more 

 greyish and scarcely inclining to olive ; the margins to the secon- 

 dary quills generally more greyish, broader, and more distinct ; bill 

 brownish black ; feet leaden brown. 



P. borealis seems to be slightly larger in its dimensions than the 

 common Marsh-Titmouse. Tor measurements see above. 



Hah. In Sweden and ISTorway P. horealis is more common than 

 P. jutlKstris. The specimens found in Switzerland and Savoy are 

 intermediate both in size and colour between the two forms in 

 question. Birds from Galicia agree with P. borealis. The Switzer- 

 land-Savoy race (the P. aJpestris) is another proof of the well-known 

 fact that alpine species resemble northern ones although geogra- 

 phically they may be widely separated. 



B. Eastern Race (P. kamtschatkensis). 



General colour above rather paler than in P. horealis. The black 

 of the cap and hind neck in old males seems to extend a little further 

 down, to the interscapular region ; iris brown. 



The following measurements of specimens from Siberia show that 

 there is really no difference in size of the wings and tails between 

 P. borealis and P. kamtschathensis : — 



Wing. Tail. 



in. in. 



c? ad 2-4 2-3 



cJ ad 2-4 2-25 



cJ ad 2-52 2-6 



d ad 2-.57 2-4 



c? ad 2-3 2-25 



Hah. Kepresents P. borealis in Siberia, Kamtschatka, and Japan. 

 Parus borealis (Western Race). 



river, Sept. 11. 



