22 



Rhoads, Washington and British Columbia Birds. 



TAuk 

 Ljan. 



the material on which Baird's proposed separation rests is five specimens 

 from the Pacific slope, three of which were obtained at Steilacoom, Wash- 

 ington. The tvpe locality being in the northwest, this race can be ignored 

 only on a comparison of series from this region with Atlantic coast speci- 

 mens. Owing to the scarcity of specimens from Washington or British 

 Columbia this has heretofore been impossible. The subjoined table 

 supplies the necessary information. The measurements (which are in 

 inches) are all my own and are taken only from skins collected by Mr. 

 Streator and myself in the respective districts named. 



Wing Tail 



Vancouver Island 



Bill from 

 nostril Tarsus 



2.63 

 2.63 

 2.58 

 2.62 

 2.62 

 2.65 

 2.6o 

 2.63 



2.00 

 2.08 



1.8S 

 2.00 

 1.89 

 2.00 

 1.99 

 i-95 



•27 

 •27 

 .27 

 .27 

 .27 

 .28 

 .26 

 •3° 



Average, 2.62 1.97 



•27 



East Cascade Region 

 2.66 2.02 

 1.97 

 1 90 



2.60 

 2.60 



2-75 

 2.62 



2-55 



2.08 

 2.00 

 i-95 



62 

 60 

 62 



63 

 62 

 62 

 63 

 63 



Wing 

 We 



2-55 

 2.64 

 62 

 62 

 60 

 66 

 60 

 65 



Bill from 

 nostril Tarsus 



(>2 



Average, 2.62 1.99 .28 .64 



Atlantic Coast averages, 2.77 



Northwest averages, 2.62 



Differences, .15 



Tail 

 st Cascade Slope 



1. S 5 

 2.00 



2.05 



1.98 

 1.98 

 2.00 



i-95 

 2.00 



2.62 



1.97 



-7 



Atlantic Coast. 



61 



74 

 64 



65 

 70 



63 

 66 



75 

 67 



.14 



.04 



•05 



Ridgway's averages (eastern). 2.84 2.22 .31 .70 



" " (western). 2.69 2.14 .30 .6S 



Differences, 



•15 



.08 



It will be seen that Northwest skins average about .15 inch larger in 

 length of wing and tail, .04 in bill and .05 in tarsus measurements. These 

 marked differences are of themselves sufficient to make swaitisonii more 

 distinctly subspecific than many other western forms of eastern species 



