332 Rhoads on the Hudsonian Chickadee and its Allies. 



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 1888 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 011 

 upper parts, throat and loral region noticeable in fall specimens 

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

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

 the calibre of smaller kzidsonictcs . 



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 7 adults:— ^N\n^,(,^ mm. (65 to 71); tail, 66 

 (6410 69) ; tarsus, 17 (16.5 to 17.5) ; bill from nostril, 7,6 (7.3 to 8.3). 



Specimens and localities:— F\e\d, British Columbia, 4; Eagle Pass, B. 

 C, I ; Toad JVIountain, B., C, i ; St. Mary's Lakes Montana, i. 



Table of Measurements' of the Parus hudsonicus Group. 



















E 



j Skins 







ill) 











Bill, fro 

 nostril 





Parus hudsonicus 



58-64 



(61) 



58-64 



(60) 



15-5- 



16.S (16) 



6-5-7-5 (7) 



IS 



Parus hudsonicus 



ungava 

 Parus hudsonicus 



stoneji 



63-68 



(65-5) 



63-68 



(65) 



16 - 



16.S (16.2) 



6 5-7-5 (7) 





62-66 



(64) 



64-68 



(66) 



16 - 



16.5 (16.3) 



7 -7-2 (7-1:) 



H 



Parus hudsonicus 



60-70 



(65-4) 



61-68 



(65) 



16.5- 



7 (16.8) 



6.7-S (7.2) 



7 



Parus hudsonicus 

 colurabianus 



65-71 



(67) 



64-69 



(66) 



16.S- 



7-5 (17) 



7-3-8.3 (7-6) 



1 Measurements in millimetres. 



