202 BULLETIN 50, UNITED STATES NATIONAL MUSEtJM. 



IVIrm] hypochri/sevs Gray, Hand-list, i, 1869, 382, no. 5778, part.— Sclatek and 



Salvin, Norn. Av. Neotr., 187:-!, 12, part. 

 Vlireo] hypochrysens Ridqway, Man. N. Am. Birds, 1887, 478, part. 



VIREO HYPOCHRYSEUS SORDIDUS Nelson. 

 TEES MARIAS VIREO. 



Similar to V. h. hypochryseua, but larger and much duller in color; 

 upper parts much duller and more grayish olive-green; under parts 

 paler and more olivaceous yellow. 



Adult maZe.— Length (skins), 132-141 (138); wing, 65-68 (66.6); 

 tail, 57-62 (59.7); exposed culmen, 13-14 (13.4); tarsus, 20-21 (20.2); 

 middle toe, 11." 



Adult female.— h&ngt\i (skins), 132-142 (134.5); wing, 64-65 (64.7); 

 tail, 58-60 (59.2); exposed culmen, 13-14 (13.3); tarsus, 20; middle 

 toe, 11.* 



Tres Marias Islands, western Mexico. 



Vireo hypochry.ieus (not of Sclater) Baird, Review Am. Birds, 1866, 370, part 

 (Tres Marias Islands).— Geayson, Proc. Bost. Sec. N. H., xiv, 1871, 281 (Tres 

 Marias).- Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 272 (Tres Marias).— 

 Salvin and Godman, Biol. Centr.-Am., Aves, i, 1881, 204, part (Tres 

 Marias). — Gabow, Cat. Birds Brit. Mus., viii, 1883, 304, part (Tres Marias). 



IVireo'] hypochrysens Gray, Hand-list, i, 1869, 382, no. 5778, part (Tres Marias). — 

 Sclater and Salvin, Nom. Av. Neotr., 1873, 12, part. 



V[ireo] hypochryseus Ridgway, Man. N. Am. Birds, 1887, 478, part. 



Vi'iro hypochryseus sordidus Nelson, Proc. Biol. Soc. Wash., xii, Jan. 27, 1898, 

 10 (Maria Madre I., Tres Marias; coll. U. §. Nat. Mus.); North Am. Fauna, 

 no. 14, 1899, 54 (do.). 



VIREO VICINIOR Coues. 

 GRAY VIREO. 



Adults {sexes alike). — Above, including auricular region, plain gray 

 (between slate-gray and mouse gray), slightly tinged with olive-green 

 on rump and upper tail-coverts; wings and tail grayish duskj' with 

 pale gray edgings, these broader and whitish on tertials and outermost 

 recti'ices, the latter broadly margined all around with white (except in 

 worn plumagd); greater wing-coverts tipped with pale gv&y or grayish 

 white, but this not forming a distinct or sharply defined band; lores 

 pale gray or grayish white; orbital ring white or grajdsh white; malar 

 and suborbital regions pale gray; under parts dull white, or grayish 

 white, the anterior half (chin, throat, and chest) more tinged with 

 grayish, becoming strongly so on lateral portions and on sides of 

 breast; sides and flanks tinged with olive (especiallj- in fresh plumage); 

 white of abdomen, etc., faintly tinged with sulphur yellow in fresh 

 plumage; axillars and under wing-coverts white, faintly tinged with 

 sulphur j^ellow; inner webs of remiges rather indistinctly edged with 



" Six specimens. ^ Four specimens. 



