1918 ] Grinnell: The Subspecies of the Mountain Chickadee 513 
account it seems best placed under abbreviatus. Fresh-plumaged fall 
specimens from this locality would make determination more certain. 
A specimen (jj, no. 547, Mus. Vert. Zool.) from Anthony, Baker 
County, Oregon, taken October 16, 1907, might be referred to P. g. 
abbreviatus; but the tone of color of back and sides is much darker 
than usual in that form. It is certainly much darker than in P. g. 
inyoensis. Its tail is but 65.3 mm. long. A skin (9, no. 18, Morcom 
coll.) from Camp Harney, Harney County, Oregon, February 17, 
1875, has a tail length of 67.7 mm., and in depth of color is about 
intermediate between abbreviatus and P. g. gambeli. A specimen 
(2, no. 186639, U. 8. Nat. Mus., Biol. Surv. coll.) from Fort Spokane, 
Lineoln County, Washington, September 28, 1890, is almost identical 
with gambeli in coloration; but it, too, has a short tail, only 64.4 mm. 
long, though there is chance of error here, as several of the rectrices 
are missing. The writer prefers to leave these last three examples for 
the time being unplaced. 
It is clear that intergradation between Penthestes gambeli gambeli 
and any one of the other three subspecies is less well established than 
between any two of these other three. But sufficiency of material from 
the proper localities through eastern Oregon and eastern Washington 
would likely prove its existence as is the case between the California 
forms. 
MEASUREMENTS (IN MILLIMETERS) OF SELECTED SPECIMENS REPRESENTING THE 
Four Races or Penthestes gambeli 
Penthestes gambeli gambeli 
N. a Exposed Depth 
no. Sex Date Locality Wing Tail culmen of bill 
160697 ¢ Noy. 24,1892 Boulder, Colo. 71.7 71.2 8.8 4.0 
109948 @ Oct. 8,1886 Pueblo, Colo. 72.0 72.4 8.4 3.9 
109949 ¢ Oct. 5,1886 Pueblo, Colo. 70.9 70.3 8.5 4.0 
176650 og Sept. 23,1888 Madison R., Gallatin Co., Mont. 68.0 67.8 8.9 4.1 
124151 g Sept.15,1888 Jefferson R., Gallatin Co., Mont. 69.7 67.7 10.0 3.6 
188823 ¢ Oct. 15,1902 Mammoth Hot Springs, Wyo. 68.1 67.0 9.0 3.6 
62546 og Nov. 17,1872 Filmore, Utah 69.8 68.3 8.3 3.5 
1366381 4 Sept.27,1890 Sawtooth Lake, Idaho 68.1 69.7 8.8 3.8 
2282271 g Sept.14,1910 Teton Pass, Wyo. 71.2 70.4 8.3 3.6 
1930861 ¢ Nov. 6,1903 Manzano Mts., N. Mex. 71.4 70.6 7.8 4.0 
184653 ¢ Oct. 22,1902 Corona, N. Mex. 69.0 71.0 9.0 4.1 
192942 g Oct. 10,1903 Twining, N. Mex. 72.0 71.4 8.5 4.0 
1366371 g Sept.18,1889 San Francisco Mt., Ariz. 71.3 70.3 7.8 3.8 
205661 ¢ Sept.10,1909 Kaibab Plateau, Ariz. 73.5 74.3 8.3 4.0 
1 Biol. Sury. Coll. 
