1889.] BREWSTER, Descriptions of New Birds. 93 
As will be seen from the above description the characters upon 
which this subspecies is based are presented solely by the female, 
all the males (thirty in number) in my Lower California series 
being, as far as I can discover, absolutely inseparable from eastern 
males of /. swbzs. The differences in the females of the two 
forms are sufficient, however, to afford excellent subspecific char- 
acters. Female szézs is essentially unicolored above—although 
some specimens show traces of a brownish nuchal collar and are 
more or less grayish on the forehead. Beneath it has the throat, 
jugulum, sides of body, and most of the breast dull slaty or brown- 
ish, the feathers of the anal region and crissum with broad slaty 
centres, while the only approach to an immaculate white area is 
a small patch on the middle of the abdomen. The under wing- 
coverts are always, as far as I have seen, plain dark slate, although 
there is usually a little whitish on the bend of the wing. De- 
scribed in equally general terms the female of hesferza may be 
said to have the forehead, fore part of crown, nuchal collar, and 
entire under parts ashy white, the darker markings and shades 
described in detail above being only apparent on a critical exam- 
ination. My series of hesperza contains two spring males ina 
plumage about intermediate between that of the females of swdzs 
and hesperza ; they are evidently young birds in the second year. 
Mr. Batchelder has two females from the Ojai Valley, California, 
which are practically identical with my Lower Californian speci- 
mens. 
Compsothlypis pulchra, new species. BEAUTIFUL PARULA. 
Spec. CHAar.—Most nearly like C. xigrilora, but with the white wing- 
bands broader (sometimes fused into a single broad, white patch), the 
white spots on the tail nearly twice as extended, the outer web of the 
outer tail feather margined with white, the yellow beneath extending 
further back on the abdomen, the sides and most of the flanks, as well as 
the throat and breast, strongly tinged with orange brown. 
& ad. (No. 14,379, collection of W. Brewster, Hacienda de San Rafael,* 
Chihuahua, Mexico, May 8, 1888; M. Abbott Frazar). Above of the 
same ashy blue or blue gray color as C. americana with a bright olive 
green dorsal patch precisely as in that species; wings and tail generally 
similar to those of americana but with even more white, this on the 
* This Hacienda, according to Mr. Frazar, is on the direct road from Alamos 
(Sonora) to Jesus Maria (Chihuahua), just inside the western boundary of the Province 
of Chihuahua. It is situated just below the oak belt in a semi-tropical region. 
