Brewster on Birds of Fort Walla Walla , W T. 23 I 
respectively Oct. 13 and Oct. 21, 1881. Neither of these calls for any 
special comment, but I take the present opportunity to characterize the 
adult plumage of the male, which apparently has not been previously 
described.* 
Falco richcirdsoni , adult $ (author’s collection, Colorado Springs, 
Colorado, C. E. Aiken). Above pale ashy-blue, most of the feathers 
of the back, as well as the inner secondaries and many of the scap- 
ulars, with fine, black shaft-lines ; crown tinged with ochraceous (prob- 
ably wanting in the highest conditions of plumage), the black shaft- 
lines here very numerous, each feather being conspicuously marked; 
forehead and sides of head light ochraceous, the former with narrow black 
streaks, the latter with broader brownish ones ; a well-defined nuchal 
collar of rus ty-och race o u s with darker mottling; secondaries and primary 
coverts concolor with the back, but with light bars on their inner webs ; 
primaries plumbeous-brown, margined with bluish-white and marked 
conspicuously on both webs with the same color, the markings on the 
inner webs being pure white and extending in transverse bars from the 
shaft to the edge of the feather, those of the outer webs ashy-white and in 
the form of conspicuous, rounded or quadrate spots ; tail crossed by five 
dark and six light bars, the last of the latter terminal and pure white, 
the others more or less bordered by pale ashy-blue ; all of the dark bars 
clear black excepting the basal two, which, on the central rectrices, are 
nearly uniform with the back, but decidedly darker than the light ones 
with which they alternate ; throat pure white and immaculate ; remainder 
of under parts pale ochraceous, deepest on the tibiae and crissum, where 
it is decidedly tinged with rusty; feathers of the breast, abdomen, flanks 
and sides with median stripes of clear reddish-brown, these stripes broad- 
est on the flanks (where they are sometimes actually transverse), narrow- 
est across the anterior part of the breast, and everywhere with fine but 
inconspicuous dark shaft-lines ; crissum entirely unmarked ; under tail- 
coverts and tibiae with conspicuous shaft-lines of dark brown ; edges of 
wings pale ochraceous ; under wing coverts white, barred with reddish- 
brown ; all the markings of the primaries showing distinctly on their 
under surfaces. Dimensions. Wing, 8.21 ; tail, 5. 18 ; culmen (from 
cere), .50. 
Were further proof wanting to establish this Falcon’s specific distinct- 
ness from F. columbarius, the difference in the adult plumage of the two 
would settle the question. The adult male* of F. richcirdsoni has the 
mantle almost as light as that of a Herring Gull, while the conspicuous 
ashy-white spots on the outer webs of the primaries and the six light tail 
bands constitute equally well-marked characters. The specimen above 
described is essentially similar to five examples in the National Museum. 
42. Astur atricapillus ( Wits . ) Bonajt). American Goshawk. — The 
present collection includes four Goshawks, one an adult male, the remain- 
*The supposed adult, described by Mr. Ridgway in the “History of North American 
Birds ” (Vol. Ill, p. 148), proves to be an immature bird in its second year. The 
real adult, however, was figured in the second edition of this work. 
