Magee | OBERHOLSER, Notes on North American Birds. 195 
are nearer the northern than the southern bird. This makes neces- 
sary the use of the name Myzarchus crinitus crinitus for the north- 
ern race. Mr. E. W. Nelson,! some years ago, as a result of his 
studies on this difficult genus, endorsed the opinion of Mr. Bangs 
and Mr. Howe that the Florida form is worthy of recognition. 
Now, after a careful examination of pertinent material, the present 
writer is convinced that this is the correct view. 
The Florida bird differs from that of the northeastern United 
States in its strikingly larger bill and somewhat shorter wing. 
Care must be taken in making comparisons to select actually breed- 
ing birds from Florida, since a mixture of migrant northern birds 
would of course readily obscure the characters of the race inhabit- 
ing Florida during the breeding season. The name for this Florida 
subspecies is, of course, Myiarchus crinitus residuus Howe,” and the 
type is a specimen taken at Istokpoga Lake, Florida. Compara- 
tive measurements of these two races may be found in Mr. Nelson’s 
paper.’ The summer distribution of Myzarchus crinitus residuus 
is limited to the peninsular portion of Florida; its winter range is 
unknown. 
Planesticus migratorius caurinus Grinnell. 
This northwestern form of the American Robin was first described 
by Dr. Joseph Grinnell from specimens taken at Windfall Harbor, 
Admiralty Island, Alaska.* It has generally been regarded as an 
untenable race, but Mr. H. 8. Swarth has recently claimed its 
distinctness on the basis of a study of an extensive series from 
Vancouver Island.’ Examination of a large series of western 
robins now fully substantiates Mr. Swarth’s view and shows that 
Planesticus migratorius caurinus is a form well worthy of recog- 
nition. It differs from Planesticus migratorius migratorius in its 
much smaller white terminal tail spots, paler upper parts, and more 
sharply defined blackish pileum. From Planesticus migratorius 
1 Proc. Biol. Soc. Washington, X VII, March 10, 1904, pp. 30-31. 
2 Contrib. North Amer. Ornith., I, May 21, 1902, p. 30. 
3 Proc. Biol. Soc. Washington, X VII, March 10, 1904, p. 31. 
4 Univ. Calif. Publ. Zool., V, No. 2, February 18, 1909, p. 241. 
5 Univ. Calif. Publ. Zool., X, No. 1, February 13, 1912, pp. 81-82. 
