192 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



V[ireo'] crassiroi^triii flavescens Ridgway, Man. N. Am. Birds, Sept., 1887, 476 



(Concepcion I., Bahamas; coll. U. S. Nat. Miis.; also Cat I., Green Cay, 



Rmn Cay, and Galding Key, Andros I.). 

 Vireo crassirostris flavescens Ridgway, Man. N. Am. Birds, 1887, 592; 2d ed. 1896, 



614; Auk, viii, Oct., 1891, 336 (Cat I.), 338 (Rmn Cay), 339 (Green Cay; 



Concepcion I.). — Coey, Auk, v, 1888, 157. 

 Vireo alleni (not of Cory, 1886) Cory, Cat. W. I. Birds, 1892, 17, part. 

 Vireo crassirostris alleni Cory, Cat. W. I. Birds, 1892, 116, 153, part (Berry I., Bimi- 



nis, Eleuthera, Rum Cay, Concepcion, Maragauna, and Inagua, Bahamas). 



VIREO CRASSIROSTRIS ALLENI Cory. 

 ALIEN'S VIREO. 



Similar in coloration to F. c. Jiavescejis^ but upper parts browner, 

 white wing-bands apparently broader, and outermost primary smaller." 



Adult m«Ze.— Length (skins), 115-124 (119.5); wing, 61-63 (62); 

 tail, 48.5-52 (50.2); exposed culmen, 12-12.5 (12.2); tarsus, 21-22 

 (21.3); middle toe, 11.5-12 (11.7).^ 



Adult female. — Length (skin), 120; wing, 58; tail, IT; exposed cul- 

 men, 12; tarsus, 21; middle toe, 11. 



Islands of Grand Cayman and Cayman Brae (south of Cuba), Greater 

 Antilles. 



Vireo alleni Cory, Auk, iii, Oct., 1886, 500, 501 (Grand Cayman, Greater Antilles; 



coll. C. B. Cory); v, 1888, 157; vi, 1889, 31 (Cayman Brae); Birds W. I., 



1889, 75; Cat. W. I. Birds, 1892, 17, part. 

 Vireo crassirostris alleni Cory, Cat. W. I. Birds, 1892, 116, 153, part (Grand 



Cayman ) . 



VIREO CRASSIROSTRIS APPROXIMANS Ridgway. 

 OLD PROVIDENCE VIREO. 



Similar in coloration to V. c. jiavescen.s, but tarsus longer, tail more 

 rounded, and coloration paler throughout, the ])ill light brown instead 

 of dusky. 



Adult male. — Length (skin), 125; wing, 61; tail, 52; the lateral 

 rectrices 7 mm. shorter; exposed culmen. 11; tarsus, 23; middle toe. 



Island of Old Providence, Caribbean Sea. 



Vireo approximans Ridgway, Proc, U. S. Nat. Mus., vii, July 29, 1884, 179 (Old 

 Providence I., Caribbean Sea; coll. U. S. Nat. Mus.).— Cory, Auk, iv, 

 1887, 180 (Old Providence). 



«The only specimens of this form which I have been able to examine are three 

 males and one female from the island of Cayman Brae. These are in much worn 

 and badly discolored plumage, so that a satisfactory comparison with T'. c. flarescens 

 can not be made. It is possible the two supposed forms may prove inseparable, in 

 which case V. c. flavescens would become a synonym of V. c. alleni. 



& Three specimens from Cayman Brae. 



c Measurements of the type specimen. 



