202 BtlLLETlN 50, UNITED STATES NATlOiSTAL MUSEUM. 



[ Vhro'] hi/pochryseiix Gray, Hand-list, i, 1869, 382, no. 5778, part. — Sclater and 



Salvin, Nom. Av. Neotr., 187;-!, 12, part. 

 F[«ro] hiipiK-hnjxeiis Rid(4way, Man. N. Am. Birds, 1887, 478, part. 



VIREO HYPOCHRYSEUS SORDIDUS Nelson. 

 TRES MARIAS VIREO. 



Similar to T" h. lujpoe}iry><eux^ 1)ut laroci' iiiul much duller in color; 

 upper parts much duller and more g-rayish olive-g-reen; under parts 

 paler and more olivaceous yellow. 



Adult mrtZt^— Length (skins), 132-141 (138); wing, 65-68 {^^S^)\ 

 tail, 57-62 (59.7); exposed culmen, 13-11(13.1); tarsus, 2(1-21 (20.2); 

 middle toe, 11." 



Adult female. — Length (skins), 132-112 (131.5); wing, 61-65 (61.7); 

 tail, 58-60 (59.2); exposed culmen, 13-11 (13.3); tarsus, 20; middle 

 toe, 11.'' 



Tres Marias Islands, western Mexico. 



Mn'o hyjiochryxenK (not of Sclater) Baird, Review Am. Birds, 1866, 370, part 

 (Tres Marias Islands).— (traysok, Proc. Bost. Soc. 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).— Gadow, Cat. Birds Brit. Mus., viii, 1883, 304, part (Tres Marias). 



[Vireo] hypocliryHem Gray, Hand-list, i, 1869, 382, no. 5778, part (Tres Marias).— 

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



V\_ire.o] hypochryseus Ridgway, Man. N. Am. Birds, 1887, 478, part. 



Vireo hypochryscKji sordidita Nelson, Proc. Biol. Soc. Wash., xii, Jan. 27, 1898, 

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

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



VIREO VICINIOR Coues. 

 GRAY VIREO. 



A-dults {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; wnngs and tail grayish dusky with 

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

 rectrices, the latter broadly margined all around wuth white (except in 

 worn plumage); greater wing-coverts tipped with pale gray or grayish 

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

 pale graj^or grayish white; orljital ring white or grayish 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 (especially in fresh plumage); 

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

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

 sulphur yellow; inner webs of remiges rather indistinctly edged with 



» Six specimens. ^ Four specimens. 



