158 BULLETIN 50, TJIIITED STATES NATIONAL MUSEUM. 



V\ireo] g\ilms] swainsmi? Coues, Key N. Am. Birds, 2d ed., 1884, 333. 



V\ireo] gilims swainsoni Eidgway, Man. N. Am. Birds, 1887, 472. 



[ Vireosylvia gUva] /?. swainsoni Ridgway, Orn. 40th Parallel, 1877, 448 (localities 

 in Nevada and Utah; habits, etc.). 



VireosyMa gilva, /3. swainsoni Eidgway, Field and Forest, ii. May, 1877, 197 

 (Colorado); Bull. Nutt. Orn. Club, iii, 1878, 66 (central California); Proc. 

 U. S. Nat. Mus., i, 1879, 469 (do.). 



Vireosylvia gilva swainsoni Eidgway, Bull. Essex Inst., vii, Jan., 1875, 18, 19 

 (Carson and West Humboldt Mts., Nevada); Norn. N. Am. Birds, 1881, no. 

 139a.— Belding, Proc. U. S. Nat. Mus., v, 1883,545 (Miraflores, Lower Cali- 

 fornia) . 



IVireo gilm^ swainsoni] b. swainsoni Coues, Birds Col. Val., 1878, 501. 



VIREOSYLVA GILVA BREWSTERI, new subspecies. a 

 CHIHUAHUAN WARBIING VIREO. 



Similar to V. g. swainsoni, but decidedly larger and with the sides 

 and flanks much less strongly washed with greenish olive. 



Adult male.— hength (skins), 115-125 (120.8); wing, 71-75 (73); tail, 

 49-55 (52.5); exposed culmen, 10.5-12 (11.2); depth of bill at nostrils, 

 4; tarsus, 17-18 (17.5); middle toe, 9.5-11 (10.2).* 



Adult female.— Length (skins), 117-120(118.7); wing, 71-72 (71.7); 

 tail, 49-51 (50.3); exposed culmen, 10-11.5 (10.8); depth of bill at 

 nostrils, 4; tarsus, 17-18 (17.5); middle toe, 10-10.5 (10.2).'' 



Mountains of Chihuahua (Bravo; Mina Abundancia), northwestern 

 Mexico. 



VIREOSYLVA AMAURONOTA AMAURONOTA (Salvin and Godman). 



ORIZABA VIREO. 



Adults (sexes alike). — Pileum plain sooty grayish brown (grayish 

 sepia or dark hair brown); hindneck, back, scapulars, rump, upper 

 tail-coverts, and lesser wing-coverts plain olive, darker, more decidedly, 

 and slightly brownish, olive on back, lighter and more greenish olive 

 on rump and upper tail-coverts; wings and tail dusky grayish brown 

 (dark hair brown) with pale olive edgings; a superciliary stripe of 

 dull white, passing into pale brownish gray posteriorly (over auricular 

 region) ; a narrow dusky loral streak, most distinct at anterior angle 

 of eye; auricular region olive-brownish, darker on upper portion, 

 especially near posterior angle of eye, paler on lower portion, where 

 passing into pale brownish gray on malar region, the suborbital region 

 still paler, or dull whitish; under parts dull whitish, faintly tinged 

 with pale yellow (except on chin and throat), the sides and flanks 

 tinged with light olive; under tail-coverts, under wing-coverts, and 

 axillars very pale sulphur or primrose yellow; inner webs of remiges 



a Type, no. 218U, collection of William Brewster; adult male, Bravo, Chihuahua, 

 July 24, 1888; M. Abbott Frazar. 

 !'Six specimens. 

 « Three specimens, 



