42 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Immature male {second year). — Exactly like the adult female in 

 coloration. 



Young male and female {first year). — Similar to the adult female, 

 but much duller in color, the upper parts dark grayish sooty or dull 

 grayish black, slightly if at all glossed, the gray of anterior under 

 parts fading gradually into the white of posterior portions, and inner 

 web of exterior pair of rectrices with an indistinct dull whitish or pale 

 grayish subterminal spot on edge; sides and flanks sometimes faintly 

 tinged with pale brown. 



Southeastern Mexico, in States of Tamaulipas (Victoria), Coahuila 

 (Sabinas), Vera Cruz, Oaxaca, Chiapas, and Yucatan, and southward 

 through Central America and South America to Peru, Bolivia, and 

 southern Brazil; island of Trinidad. 



\_IIirundo'] chalybea Gmelin, Syst. Nat., i, 1788, 1026 (based on Hirondelle de 

 Cayenne, Hirimdo cayanensis Brisson, Orn., ii, 495, pi. 46, fig. 1; Buffon, Hist. 

 Nat. Ois.. vi, 675; Daubenton, PI. Enl., pi. 545, fig. 2). 



Hlirundol chalybea Maximilian, Beitr. Naturg. Bras., iii, pt. ii, 1831, 354. 



Cecropis chalybea Lesson, Compl. Buffon, viii, 1837, 498. 



Hlirundo] chalybaea Boie, Isis, 1844, 178. 



Progne chalybea Gray, Cat. Fissirostr. Birds Brit. Mus., 1848, 28. — Cassin, Illustr. 

 Birds Cal., Tex., etc., 1856, 246 ("California;" error); Proc. Ac. Nat. Sci. 

 Philad., 1860, 133 (Cartagena, Colombia). — Lawrence, Ann. Lye. N. Y., 

 vii, 1862, 318 (Lion Hill, Panama R. E. ). — Sclater and Salvin, Proc. Zool. 

 Soc. Lond., 1864, 348 (Panama) ; 1873, 258 (Xeberos, Yurimaguas, Chyavetas, 

 and Chamicuros, e. Peru); 1879, 495. — Baird, Review Am. Birds, 1865, 282 

 (Cayenne) . — Layard, Ibis, 1873, 375, 377 (Para, Brazil; habits). — Salvin and 

 Godman, Biol. Centr.-Am., Aves, i, 1883, 224, part (excl. syn. domestica 

 Vieillot).— Sharpe, Cat. Birds Brit. Mus., x, 1885, 178, 633 (Jalapa, Mexico; 

 Duenas, San Geronimo, and Cahabon, Guatemala; Honduras; Nicoya, 

 Costa Rica; Volcan de Chiriqui, Veragua; Panama; Remedios, Colombia; 

 Esmeraldas, Ecuador; Venezuela; Trinidad; Bartica Grove, British Guiana; 

 Oyapok, Cayenne; Maroni R., and Albina, Surinam; Pant, Brazil; Mexiana 

 I., lower Amazon; Xeberos, e. Peru; Bolivia). — Zeledon, Anal. Mus. Nac. 

 Costa Rica, i, 1887, 107 (Panama; San Jose, Costa Rica). — Chereie, Auk, ix, 

 1892, 22 (San Jose, Costa Rica; nesting habits). — Richmond, Proc. U. S. 

 Nat. Mus., xvi, 1893, 486 (Rio Escondido, Nicaragua; habits). — Robinson, 

 Proc. U. S. Nat. Mus., xviii, 1896, 678 (Margarita I., Venezuela).— Chap- 

 man, Bull. Am. Mus. N. H., vi, 1894, 28 (Trinidad); x, 1898, 26 (Jalapa, 

 Vera Cruz). — Robinson and Richmond, Proc. U. S. Nat. Mus., xxiv, 1901, 

 176 ( La Guaira, Venezuela). — Berlepsch and Hartert, Novit. Zool.,ix, 1902, 

 14 (Quiribana de Caicara, etc., Venezuela; crit. ). — Bangs, Proc. N. E. Zool. 

 Club, iii, 1902, 59 (Boquete and Bogaba, Chiriqui, 4,500-4,800 ft.; crit.)— 

 Clark (A. H.), Auk, xix, 1902, 266 (Margarita I., Venezuela). — Sharpe and 

 Wyatt, Mon. Hirund., 1894, 473, 488, pi. 92. 



Plrogne} chalybea Gray, Gen. Birds, i, 1845, 59. — Cabanis, Mus. Hein., i, 1850. 

 51 (Guiana; Mexico).— Ridgway, Man. N. Am. Birds, 1887, 459. 



[Progne'] chalybea Bonaparte, Consp. Av., i, 1850, 337. — Gray, Hand-list, i, 

 1869, 74, no. 887.— Sclater and Salvin, Nona. Av. Neotr., 1873, 14. 



Procne chalybea Salvadori and Festa, Boll. Mus. Zool., etc., Torino, xv, no. 

 357, 1899, 10 (Vincesand Balzar, w. Ecuador). 



