830 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
yellow instead of almost white; throat of deeper yellow; all tho black 
areas more or less varied by brownish tips to the feathers. 
Adult female in winte7' plumage. — No. lliOTl, U.S.N.M., Biological 
Survey Collection; Real del Monte, Hidalg-o, Mexico, March 10, ISIU; 
C. r. Strcator. Similar to the same sex in breedinj,^ dress, Ijut upper 
surface rendered more uniform by the broad uiiabraded paler edgings 
of the feathers; rump and bend of wing darker; forehead, super- 
ciliary stripe, and in fact most of the head more or less tinged with 
yellowish; throat deeper yellow; black of jugulum obscured by grayish 
tips of the feathers; breast washed and streaked with gray. 
Young hi jirst plumage. — No. 158831, U.S.N.M., Biological Survey 
Collection; Miquihuana, Tamaulipas, Mexico, June 9, 1SI>8; E. W. 
Nelson and E. A. Goldman. Above dull buffy grayish, every feather 
with a subterminal black area and a white apical spot, these largest on 
the back; tail as in the adult; wings sepia, edged with whitish and 
buffy; auriculars mixed grayish and whitish; lower surface white, the 
jugulum shaded with buff' and obscurely spotted with grayish. 
This form is throughout paler than chrysolmma, with a more pinkish 
cervix, besides being considerably smaller. It differs from aphi'axta 
in being nuich less cinnamomeous above, the back quite l)lackish, and 
in sharp contrast to the nape; from acila and oaxacm in paler, much 
more pinkish and grayish colors above; from amimjphlla m more 
grayish back, much more piidvish cervix, upper tail-coverts and bend 
of wing; from occldentalis in smaller size and less rufescent upper sur- 
face; from leucoloima in smaller size, darker, less ochraceous upper 
parts and usually brighter yellow throat; from enthymla in yellow 
throat, smaller size, much darker, more brownish upper surface; from 
glraudi in the very much more brownish tone of the upper surface. 
In fact, dlapliora seems to be in color most like pratieohi,, from which, 
however, it may be separated by its less blackish ])ack; l)eing, more- 
over, decidedly smaller. 
The young of diaphora can, by their very gray upper parts, be 
easily distinguished from the young of actla, oaxaccB^ aduMa., and 
aphradit ; and from merrlUi and i^Tatlcola the pale grayish instead of 
l>lackish tone of the upper surface almost as widely separates them. 
They are exceedingly close to enthymla, however, as well as to 
leucolxma^ though they average somewhat more grayish above than 
the latter. 
The specimens upon which this new form is based are breeding 
bii'ds from Miquihuana, Tamaulipas, Mexico, and since it seems im- 
possible to reconcile their characters with any of the other races, it 
becomes necessary to give them a subspecific name. One of the 
males is uniformly more cinnamomeous above than the others, thus 
verging slightly toward the appearance of apJirasta; but aside from 
this there seems to be in this series no individual differences worthy of 
mention. 
