Vol. XI, pp. 145-146 



June 9, 1897 



PROCEEDINGS 



/ 



BIOLOGICAL SOCIETY OF WASHINGTON 



\'>. 



DESCRIPTIONS OF A NEW EAGLE FROM ALASKA AND 

 A NEW SQUIRREL FROM LOWER CALIFORNIA. 



BY C. H. TOWNSENl). 



The following very distinct forms are among tlie collections 

 contributed by the writer to the U. S. National Museum between 

 1889 and 1895 : 



Haliaetus leucocephalus alascanus new subspecies. 



Suhspecific characters. — Differing from H. leucocephalus in size, being con- 

 siderably larger. 



Habitat. — Alaska. 



Type. — (5^ (U. S. Nat. Mus. Xo. 151,567). Unalaska, Aleutian Islands, 

 May 22, 1895. C. H. Tovvnsend. 



Dimensions of Type. — Wing, 23.75; tail, 11.50; tarsus, 4 ; culmen, 2.60 ; 

 depth of bill, 1.50; hind claw, 1.50. 



Coniparatire Measureinent.'<. 



Locality. 



Florida 



Florida and Lou- 

 isiana 



Aleutian Islands 



Averages. 



4 ad. (j^s. 



3 " $s. 



4 " d^s. 

 2 " $s. 



o 



1.50 



1.60 

 1.62 

 1.75 



In forty si>eciniens examined from localities between Florida and 

 Alaska there is a regular increase in size northward. Eagles from north- 



34— Biol. Soc. Wash., Vol. XI, 1897 



(145) 



