80 PROCEEDINGS OF THE ACADEMY OF 



No. 10,086, locality unknown (t} r pe of description of X. 

 cooperi, adult male, in Baird, Brewer, and Ridgway's History 

 North American Birds, vol. III. p. 230): Forehead, crown, and 

 occiput blackish-plumbeous, the latter snowy-white beneath the 

 surface; rest of upper parts slaty-plumbeous, the nape abruptly 

 lighter than the occiput ; feathers of the nape, back, scapulars, 

 and rump with darker shaft-lines; scapulars with concealed cor- 

 date and circular spots of white; upper tail-coverts sharply tipped 

 with white. Tail more brownish than the rump, sharply tipped 

 with pure white, and crossed with three broad, sharply defined 

 bands of black, the first of which is concealed, the last much 

 broadest; that portion of the shaft between the two exposed 

 black bands white. Lores grayish; cheeks and throat white, with 

 fine, hair-like, shaft-streaks of blackish ; ear-coverts and sides of 

 neck more ashy, and more faintly streaked. Ground-color be- 

 neath pure white, but broken by detached transverse bars of rich 

 vinaceous-rufous, crossing the jugulum, breast, sides, flanks, ab- 

 domen, and tibiae; the white bars everywhere (except on sides of 

 the breast) rather exceeding the rufous in width ; all the feathers 

 (except tibial plumes) with distinct black shaft-lines; lower tail- 

 coverts immaculate pure white. Lining of the wing white, with 

 numerous cordate spots of rufous ; under wing-coverts with trans- 

 verse blackish bars ; under side of primaries silvery-white, purest 

 basally (tips dusk}'), crossed with quadrate bars of dusky, of which 

 there are six (the first only indicated) upon the longest quill 

 (fourth). Wing, 9.35 ; tail, 8.30 ; culmen, .68 ; tarsus, 2.45 ; middle 

 toe, 1.55. Fourth quill longest; third shorter than fifth ; second 

 intermediate between sixth and seventh ; first, 2.80 shorter than 

 longest; graduation of tail, 1.00. 



No. 12,024, Ft. Tejon, Cal. ; J. Xantus (t3'pe of description 

 of var. Mexicanus, adult male, in Hist. N. Am. Birds, III. p. 231) : 

 Forehead, crown, and occiput plumbeous-black, feathers of the 

 latter with basal two-thirds snowy-white, partially exposed. 

 Upper plumage deep plumbeous, darkest anteriorly, the back 

 being scarcely lighter than the nape ; rump fine bluish-plumbeous. 

 No concealed white on the upper parts. Tail brownish-plum- 

 beous, narrowly tipped with pure white, and with four sharply 

 defined broad bands of black, the first of which is faintest, and 

 concealed by the coverts, the last broadest ; shafts of tail-feathers 

 deep brown throughout. Primaries and secondaries much darker 



