78 OBERHOLSER, Wew Subspecies of Dendroica. oe 
from Nushagak (U. S. N. M. No. 86517), and one from the Yukon 
River (U. S. N. M. No. 54425) are very slightly more yellowish 
above than the birds from Kadiak (the type locality), and have also 
the wing edgings somewhat brighter; but these aberrant features 
are apparently of quite trivialimportance. Of three breeding birds 
from Victoria, British Columbia, two have a fairly well-marked 
yellow crown-patch, though this is somewhat obscured by olive- 
green tips to the feathers ; but all three specimens are fully as dark 
above, and in every other respect so much like rudbiginosa that 
they are without hesitation referred to this form. 
Summer birds from Great Slave Lake (Fort Resolution and 
Fort Rae) are, however, quite typical of D. @. morcomi,; as are also 
specimens from northern California (Baird and Red Bluff), and 
one example from Fort Steilacoom, Washington (U. S. N. M. No. 
7643). It thus would seem to be indicated that the breeding 
range of rudbiginosa is almost, if not entirely, confined to Alaska 
and British Columbia. 
Three Yellow Warblers collected by Dr. Edgar A. Mearns at 
Mountain Spring, San Diego County, California, May r1, 1894, 
though rather more yellowish above than average Alaskan speci- 
mens, are closely matched by the birds from British Columbia, 
and are with little doubt referable to rudzgimosa. A spring speci- 
men from San Antonio, Texas, taken May 3, 1889 (U.S. N. M. No. 
152396), and one collected by Mr. Richmond on the Escondido 
River, Nicaragua, May 5, 1882 (U.S. N.M. No. 128416), are 
equally similar, and both belong apparently to the race at present 
under consideration. 
Among the 53 North American specimens of Dendroica estiva 
and Dendroica @. morcomi which have been examined in this con- 
nection, there are but three, with regard to whose identity, so far 
as rubiginosa is concerned, any uncertainty might exist.- One of 
these three examples is from Wheatland, Indiana, and approaches 
the Alaskan race by reason of its almost uniform coloration above, 
but the olive green portions of its plumage are, upon comparison, 
seen to be much more suffused with yellowish than in rudiginosa, 
thus leaving no question of its correct identification with D. estiva. 
The two other aberrant specimens are from Calais, Maine, and 
Moose Fort, Ontario, respectively ; and while in slight details 
