BIRDS OF NORTH AND MIDDLE AMERICA. 



723 



POLIOPTILA C^RULEA C^SIOGASTRA Ridgway. 

 BAHAMA GNATCATCEER. 



Similar to P. c. ceerulea but darker, especially the under parts, which 

 are mostly pale bluish gray, only the abdomen and under tail-coverts 

 being white. 



Adult male.— h%ngt\x (skins), 105-115 (111.7); wing, 47-52.6 (49.5)?, 

 tail, 50-54 (51.9); exposed culmen, 9.5-11.5 (10.5); tarsus, 17-18 (17.7);-. 

 middle toe, 8.5-9 (8.8)." 



Adult feviale.—hmgih. (skins), 105-112 (108.3); wing, 44.5-4:8.5. 

 (47); tail, 49-52 (50.6); exposed culmen, 10-11 (10.4); tarsus, 17-18.5 

 (17.5); middle toe, 8.5-9.5 (9).* 



Resident in Bahamas (islands of Abaco, Andros, New Providence, 

 Little Abaco, and Inagua) and on island of Cozumel and adjacent coast 

 of Yucatan (Merida). 



Poliopiila cserulea {not Motadlla cssruUa Linnseus) Cory, Birds Bahama I., 1880, 

 52, part; Auk, iii, 1886, 23, part; Birds W. I., 1889, 37, part.— Shahpe, Cat. 

 Birds Brit. Mus., x, 1885, 442, part. — Ridgway, Proc. U. S. Nat. Mus., viii, 

 1885, 561 (Cozumel); Auk, viii, 1891, 334 (Abaco I., Bahamas).— Cory, 

 Auk, viii, l'891, 350 (Abaco), 351 (Inagua). 



\_Polioptila\ cserulea Cory, List Birds W. I., 1885, 6, part. 



Plolioptila] cserulea ciesiogaster Ridgway, Man. N. Am. Birds, 1887, 569 (New 

 Providence I., Bahamas; coll. U. S. Nat. Mus.). — Hellmayr, Novit. Zool., 

 vii, 1900, 53'5 (crit.); Tierreich, 18 Lief., 1903, 21. 



Polioptila cierulea csesiogaater Ridgway, Man. N. Am. Birds, 1887, 592; 2d ed., 

 1896, 614; Auk, viii, 189], 335 (New Providence I., Bahamas). — Northrup, 

 Auk, viii, 1891, 67 (Andros I., Bahamas).— Cory, Auk, v, 1888, 157; Cat. 

 W. I. Birds, 1892, 120, 127, 156 (Bahamas).— Bangs, Auk, xvii, 1900, 289 

 (New Providence) .—BoNHOTE, Ibis, 1903, 277 (Little Abaco I.). 



PolioptUa cicsiogakerf Salvin, Ibis, 1888, 245 (Cozumel I.; crit.). 



" Twelve specimens from Bahamas. 



b Seven specimens from Bahamas. 



Specimens from different islands average, respectively, as follows: 



Locality. 



Middle 

 toe. 



MALES. 



Eight adult males from Abaco 



Four adult males from New Providence 



Seven adult males from Cozumel and Yucatan 



FEMALES. 



Four adult females from Abaco 



Three adult females from New Providence 



One adult female from Inagua 



One adult female from Cozumel : 



8.7 

 8.7 



9.1 

 8.7 



Cozumel specimens are slightly darker above, especially on the pileum, and may 

 prove to be separable from the Bahama birds. 



