256 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



283(259); wing, 171-190 (178.2); tail, 83-98 (89.6) ; culmen, 23.5-26 

 (24.8) ; tarsus, 17.5-20 (18.9) ; outer anterior toe, 22-26 (23.8).° 



Immature male. — Similar in coloration to adult female, but with 

 white of forehead more restricted. 



Immature female. — Similar to the immature male, but with little 

 if any red on sides of head, except on lores. 



Young male. — Similar to the immature male, but red of head 

 confined to lores and anterior margin of forehead, and white of fore- 

 head still more restricted, often tinged with, or replaced by, pale 

 yellow. 



Young female. — Similar to the immature female, but without 

 any red on head, the entire suborbital region green, the superciliary 

 region dull greenish blue or bluish green, except anteriorly, where* 

 together with forehead and lores, dull white. 



Western Mexico, in States of Sinaloa (Mazatlan; Presidio de 

 Mazatlan; Mocovito; Escuinapa; Alota; .Eio Juana Gomez), 

 Guerrero (Acapulco), Oaxaca (La Parada; Santa Efigenia; Puerto 

 Angel; Huil6tepec; Juchitan; Chihuitan; Tehuantepec; Cacoprieto) 

 and Mexico (near City of Mexico), and Territory of Tepic (San Bias). 



Psittacus albifrons Sparrman, Mus. Carls., fasc. 3, 1787, no. lii, pi. 52 (based on 

 White-crowned Parrot Latham, Synopsis Birds, i, 281, no. 88, var. B). — Bech- 

 stein, Lathams Uebers. Vogel, i, 1793, 713. — Shaw, Gen. Zool., viii, pt. 2, 



a Twelve specimens. 



