1910] Grinnell.—Birds: Alaska Expedition, 1908. 389 
I have been unable to detect any difference of coloration. Mr. 
Bell, of New York, says that the difference in size between living 
birds of New York and California is very striking.’’ In Baird, 
Brewer, and Ridgway’s History of North American Birds (vol. 
II, 1874, p. 393) it is stated that ‘‘western specimens are ap- 
preciably larger, especially those from the northwest coast.’’ 
The accompanying tables of measurements show that the 
secondary wing quills are proportionally longer in the north- 
western birds. This means that in addition to its greater ex- 
panse of wing and generally larger size, the wing of cawrina is 
broader. In the closed wing this difference presents itself con- 
spicuously in the interval between the end of the longest second- 
ary and the tip of the longest primary. In the northwestern 
birds this interval averages (from the accompanying tables) only 
27.3 mm., while in the eastern birds it averages 33.7 mm. This 
is in spite of the larger size of the former. The ratio to total 
wing length in the two eases is 17 and 22 per cent. respectively. 
To express it differently, the secondaries are to the primaries as 
83 to 100 in the Alaskan birds, and as 78 to 100 in the eastern 
birds. (See figs. 4-5.) 
Ceryle alcyon caurina. 
Bill from Depth of 
No. Sex Loeality Wing Tail Culmen Nostril Bill eis 
1230 gad. Hawkins Id. 160.5 92.8 57.0 45.0 14.2 131.8 
1233 gad. MontagueId. 161.2 96.0 55.3 45.3 13.7 32.7 
1229 @ijy.* Hinchin- 
brook Id. 144.3 80.0 49.6 38. 12.5 
1231 @ jv. Hoodoo Id. 167.0 97.4 56.1 43.7 14.5 
1232 Qad. Knight Id. 165.9 98.0 55.0 45.0 14.0 
Ceryle alcyon alcyon. 
Billfrom Depth of 
Sex Locality Wing Culmen Nostril Bill ** 
oA Tilinois 146.5 47.4 38.7 12.8 122.7 
J Michigan 155.8 54.5 46.8 14.0 121.0 
2 Wisconsin 152.5 56.8 47.5 14.2 118.0 
°) Illinois 151.2 49.7 41.0 12.7 120.4 
2 Florida L58e7 54.0 46.9 14.4 109.0 
* Not fully grown. 
** Bend of carpus to end of longest secondary, on closed wing. 
