670 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Adult feiuale.— Length (skins), 167.64-180.34 (176.02); wing, 82.55- 

 91.19 (86.11); tail, 80.01-83.31 (81.28); exposed culmen, 17.02-19.05 

 (18.03); depth of bill at base, 14.73-15.24 (14.99); tarsus, 22.10-24.13 

 (23.11); middle toe, 16.51-17.53 (17.02.)^ 



Isthmus of Panama, north to Chiriqui (David) and Veragua (Santa 

 Fe; Chitra); San Miguel Island, Gulf of I'anama!'' 



Saltator atrkdipcrtus (not of Lafresnaye) Lawrence, Ann. Lye. N. Y., vii, 1861, 

 331 (Lion Hill, Panama R. R.); viii, 1865, 175 (David, Chiriqui). 



Saitator istlimicus Sclater, Proc. Zool. 8oc. Lond., 1861, 130 (Panama; coll. P. L. 

 Sclater); Cat. Am. Birds, 1862, 97 (do.). — ^Sclater and Salvix, Proc. Zool. 

 Soc.Lond., 1864, 351 (Lion Hill).— Salvin, Proc. Zool. Soc. Lond., 1867, 141 

 (David, Chiriqui; Santa Fe, Veragua); 1870, 189 (Chitra, Veragua). 



[^Saltator'] isthmicuH Gray, Hand-list, ii, 1870, 75, no. 7095. 



Saltator albicoUis isthmicus Bangs, Proc. New Engl. Zool. Clul), ii, Sei)t. 20, 1900, 

 32 (Lion Hill); Auk, xviii, 1901, 32 (San Miguel L, Bay of Panama). 



[Saltator'] albicollift (not of Vieillot) Sclater and Salvin, Nom. Av. Neotr., 1873, 

 26, i^art. 



Saltator albicolMs Salvin, Proc. Zool. Soc. Lond., 1883,421 (Panama). — Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, i, 1883, 330, part (Volcan de Chiriqui 

 and David, Chiriqui; Chitra and Santa Fe, Veragua; Panama and Lion Hill, 

 Isth. Panama).— Sclater, Cat. Birds Brit. Mus., xi, 1886, 294 (Santa F^^ and 

 Chitra, Veragua; Panama). 



1 Six specimens from Isthmus of Panama. 



^A series of fourteen adults from San Miguel Island in the collection of Messrs. E. A. 

 and 0. Bangs, collected April 27 to May 7, shows decided color differences from an equally 

 large series from the mainland, the under parts having niuch less of the olive-yellowish 

 wash across chest and along sides, and the streaks grayer. The ujjper parts are also 

 grayer, especially anteriorly. In the absence of specimens of corresponding date 

 from the mainland of the Isthmus (none of the specimens from the latter having 

 been obtained later than March 25), I am unable to determine whether the differ- 

 ences are seasonal or otherwise. Average measurements of the mainland and island 

 specimens, together with specimens of *S'. a. alhicollis, are as follows: 



