Q2 BREWSTER, Descriptions of New Birds. [April 
manz, but judging from descriptions the only important differences 
are that affinzs has a yellow crissum, a narrow black, frontal band 
and no decided purplish except on the throat and head. (‘‘Atro- 
cerulea, capite et gutture paulo purpurascentiortbus ; fronte 
anguste nigra.’)* Inthe size and shape of the bill the two ap- 
pear to agree closely. The bill of mzzzzma, on the other hand, is 
very much slenderer than in godmanz, and this difference seems 
to me of more importance than color, especially as the crissum of 
godmant is tinged slightly with yellow, a fact which indicates 
probable variations in this character. 
Progne subis hesperia,t new subspecies.—WESTERN MARTIN. 
SuBsp. CHAr.—Female differing from female szdzs in having the abdo- 
men, anal region, crissum, and under tail-coverts pure white, nearly or 
quite immaculate, the throat, breast, flanks, forehead, fore part of crown 
and nuchal collar grayish white, the feathers of the back and rump con- 
spicuously edged with grayish or pale brown, the bend of the wing and 
the under wing-coverts mottled profusely with whitish. Male indistin- 
guishable from the male of szdzs. 
6 ad. (No. 15,394, collection of W. Brewster, Sierra de la Laguna, 
Lower California, June 4, 1887; M. Abbott Frazar). Entire plumage 
dark purplish blue; wings and tail black glossed with purple; the under 
surface of the shafts of all the wing and tail feathers broccoli-brown ; 
feathers of crissum whitish at base. Wing, 5.56; tarsus, .57; tail, 2.07; 
culmen from nostril, .32 inch. 
Q ad. (No 15,395, collection of W. Brewster, Sierra de la Laguna, 
Lower California, June 4, 1887; M. Abbott Frazar). Forehead, crown 
as far back as posterior corner of eyes, and nuchal collar brownish white ; 
wings and tail slaty black with a faint purplish gloss; the under shafts 
of all the quills broccolibrown as in the male; remainder of upper parts 
dark purplish, all the feathers, including the scapulars, conspicuously 
tipped with brownish white; beneath ashy white, the chin, jugulum, and 
throat slightly tinged with smoke-gray, the breast with much concealed 
slate-gray, only the tips of the feathers being white, the flanks nearly 
pure slate; most of the feathers of the under parts with shaft lines of 
slaty, but these so fine that they are nowhere very conspicuous, while on 
the anal region and crissum they are nearly wanting; under wing-coverts 
and feathers of bend of wing beneath broadly tipped with white. Wing, 
5-44; tarsus, .61; tail, 2.83; culmen from nostril, .34 inch. 
Hlabitat. California (Ojai Valley ) and Lower California 
(Sierra de la Laguna). 
*Biol. Centr. Am. Vol. I (Aves), p. 258. 
t+Hesperius = western. 
