94 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



IDIOTES RUFIFRONS DUGESI (Ridgway) 



Basileuterus rufifroiis (not Setophaga rufifrans Swainson) Heine and 



Reichenow, Nom. Mus. Heineani Orn., 1882, p. 14 (Oaxaca, Mexico). 

 BasUeuterus rufifrons dugesi Ridgway, Proc. U. S. Nat. Mus., vol. 15, 1892, 



p. 119. part (Guanajuato. Mexico; orig. descr. ; type in coll. U. S. Nat. 



Mus.) ; Bull. U. S. Nat. Mus., No. 50, vol. 2, 1902, p. 747, excl. Sinaloa 

 ' localities and refs. (descr.; range; refs.). — Smith, Condor, vol. 11, 1909, 



p. Gl (Cuernavaca, Morelos ; habits). 

 BasUeuterus rufifrons jouyi (not of Ridgway) Jouy, Proc. U. S. Nat. Mus., 



vol. IG. "1893," 1894, p. 777, part (Barranca Ibarra, Jalisco). 



Subspecific characters. — Similar to Idiotes rwflfrons ru-flfron^., but 

 general color of upper parts, wings, etc., duller (dark buffy olive). 



Measurements. — Male: Wing, 51-55 (average, 52.5); tail, 52-61 

 (57.4); bill, 9-10.5 (9.5); tarsus, 19.5-21.5 (20.5). Female: Wing, 

 50-58 (52) ; tail, 52-59 (56) ; bill, 9-10 (9.5) ; tarsus, 19-21 (20). 



Range. — Central Mexico, west to Jalisco, and south to Oaxaca. 



Remai'ks. — This is an unsatisfactory form. It is in fact merely 

 the name applied to a series of intergrades between true i^u-fifrons of 

 the Vera Cruz region and the pale, grayish, washed-out race of 

 northwestern Mexico. Birds from Oaxaca approach rufifrons in 

 their more greenish color above, while those from Jalisco verge more 

 towards caudatus^ as also does the type, from Guanajuato. Taken as 

 a series, the specimens listed below are barely separable as a namable 

 race, after allowing for differences due to wear. In fact, if the type- 

 specimens of dugesi., caudatus., and jouyi were the only specimens 

 available, I fail to see how these races could be told one from 

 another, but in series they can be roughly separated. 



Specimens exafmined. — Mexico: Tepic, Tepic, 1; Barranca Ibarra, 

 Jalisco, 2; San Sebastian, Jalisco, 3; Talpa, Jalisco, 2; Tuxpan, 

 Jalisco, 7; La Pisagua (near Volcano Tolima), Jalisco, 3; Volcano 

 Tolima, Jalisco, 1 ; Bolanos, Jalisco, 1 ; Zapotlan, Jalisco, 1 ; Guadala- 

 jara, Jalisco, 1; Volcan de Fuego, Jalisco, 1; Sal se Puerdes (5,000 

 feet), Jalisco, 1; Guanajuato, Guanajuato, 1 (type of subspecies); 

 Patzcuaro, Michoacan, 3; Los Reyes, Michoacan, 1; Rio Balsas, Guer- 

 rero, 2; El Naranjo, Guerrero, 1; Cuernavaca, Morelos, 1; Oaxaca, 

 Oaxaca, 2; Juquila, Oaxaca, 1; Cuicatlan, Oaxaca, 1. Total, 37. 



IDIOTES RUFIFRONS CAUDATUS (Nelson) 



BasUeuterus rufifrons (not Setophaga rufifrons Swainson) Baird, Rev. 

 Amer. Birds, 1865, p. 248, part (Sierra Madre, near Mazatlan, Sinaloa). — 

 Lawrence, Mem. Boston Soc. Nat. Hist., vol. 2, 1874, p. 270 (Sierra 

 Madre, Sinaloa). — Salvin and Godman, Biol. Centr.-Amer., Aves, vol. 1, 

 1881, p. 175, part (Sierra Madre, Sinaloa, ex Baird and Lawrence). — 

 Allen, Bull. Amer. Mus. Nat. Hist., vol. 5, 1893, p. 41 (Napolera, Chi- 

 huahua). 



