33 2 



Rhoads on the Hudsonian Chickadee and its Allies. 



TAuk 

 LOct. 



Little may be added to the original description of this 

 subspecies. Two additional specimens secured in 1889 in British 

 Columbia have been kindly loaned by Prof. J. Macoun of the 

 Canadian Geological Survey. They confirm the characters 

 assigned to the type specimens, and are of special interest as 

 having been taken respectively on the Gold and Selkirk Ranges, 

 nearly one hundred miles south and west of the central Rockies 

 at Field. 



Another specimen of columbianus, no less typical, was taken 

 by Mr. G. B. Grinnell in 188S at St. Mary's Lakes in the Rocky 

 Mountains, a few miles south of the northern boundary of 

 Montana. Besides the absence of any decided shade of brown on 

 upper parts, throat and loral region noticeable in fall specimens 

 of all the other forms, columbianus has a longer, much heavier 

 and thicker bill than any of them, that member being nearly twice 

 the calibre of smaller hudsonicus. 



While columbianus may be classed as the greatest remove in 

 the direction of specific separation from hudsonicus, I feel no 

 hesitation in classing it, with the others, as nothing more than 

 a subspecies of Forster's type. 



Average measurements of J adults: — Wing, 67 mm. (65 to 71); tail, 66 

 (64 to 69) ; tarsus, 17 (16.5 to 17.5) ; bill from nostril, 7.6 (7.3 to S.3). 



Specimens and localities: — Field, British Columbia, 4 ; Eagle Pass, B. 

 C, 1 ; Toad Mountain, B., C, 1 ; St. Mary's Lakes Montana, 1. 



Table of Measurements 1 of the Parus hudsonicus Group. 



1 Measurements in millimetres. 



