ART. 7 REVISION- OF THE GENUS BASILEUTEEUS — TODD 11 



Griscom, in describing two proposed new races of this group from 

 western Panama, has called attention to the characters separating 

 seTnicervina (and fulvicauda) from leucopygia^ and has suggested 

 that they may be distinct species. They are certainly different-look- 

 ing birds, when typical series are compared. The lighter green upper 

 parts, cjouded under surface, and more extensively dark and more 

 sharply bicolored rectrices of leucopygia are all good characters as 

 compared with semicervinu. These characters are well pronounced 

 in the three specimens from the Caribbean slope of westei'n Panama, 

 on which Mr. Griscom has based his proposed new race gaffneyi. 

 While these at first impressed me as a good form, I find on further 

 examination that they are so close to topotypical leucopygia that 

 it is not worth while to keep them distinct. Some variation in the 

 exact type of coloration obtains in birds from all sections so far 

 as the shading of the under parts is concerned, but it is certainjy not 

 geographical. The close approach of a race of this spotted-breasted 

 type to the plain-breasted form at the Isthmus of Panama, with (so 

 far) no real evidence of intergradation, induces me to keep the two 

 specifically distinct. 



Typical leucopygia is a common bird in the Tropical Zone of Costa 

 Kica and Nicaragua, and has been traced as far north as the Segovia 

 River in Honduras. From southwestern Costa Rica eastward along 

 the Pacific slope it is replaced by the next form. 



SpeciTTiens examined. — Honduras : Segovia River, 1. Nicaragua : 

 Savala, Matagalpa, 1; Las Canas (6 miles E. of Matagalpa), 1; Rio 

 Tuma, 1; Rio Grande, 2; Los Sabalos, 1; Lone Star Fajls, near 

 EdeUj 2; Pena Blanca, 1. Costa Rica: Pozo Azul de Pirris, 2; 

 Guapiles, 2; Guacimo, 2; Cariblanco de Sarapiqui, 2; Carrillo, 6; 

 El Hogar, 1 ; Rio Frio, 2 ; Reventazon, 2 ; Angostura, 2 ; Tenorio, 5 ; 

 La Vijagua, 9; El General, 3; Turrialba, 1; Siquirres. 1: Miravalles, 

 3; La Iberia, 2; Punto Jimenez, Golfo Dulce, 1; Bonilla, 1; unspeci- 

 fied, 1. Panama: Guaval, Rio Calovevora, 3 (including type of 

 BamJeuterus fvXvicauda gdfneyi) . Total, 62. 



PHAEOTHLYPIS LEUCOPYGIA VEKAGUENSIS (Sharpe) 



BasUeuteriis uropi/ffialis (not of Sclater) Salvin, Proc. Zool. Soc. London, 

 1807, p. 136, part (Santa Fe, Veragua ; refs.) : 1870, p. 183 (Bugaba, 

 Veragua ) . 



Basileutet-tis leiicopyffius (not of Sclater and Salvin, 1873) Salvin and 

 GoDMAN, Biol. Centr.-Amer., Aves, vol. 1, 1881, p. 172, part (Panama local- 

 ities and refs. [part] ; descr. ; crit.). 



Basileuterus veraguensis Sharpe, Cat. Birds Brit. Mus., vol. 10, 1885, p. 

 403 (Bugaba, Santa Fe, Panama, and Paraiso Station [type localitj^], 

 Panama; orig. descr.; type in coll. Brit. Mus.). — Cherrie. Anal. Inst. 

 Fis.-Geog. Nac. Costa Rica, vol. 6, 1893, p. 12 (Rio Naranjo, Costa Rica; 

 crit.).— Cherrie, Expl. Zool. Costa Rica, 1891-2, vol. 1, Aves, 1893, p. 

 14 (Buenos Aires, Costa Rica). 



