90 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



Kans., 1 pair, July 1870). — Hatch, Bull. Minnesota Acad. Nat. Sci., 1874, 

 51 (Minnesota; common). — D'IIamonville, Ois. Eur., 1876, 6 (England).— 

 Nelson, Bull. Essex Inst., viii, 1876, 118 (ne. Illinois, rare within last 20 

 years).— McCauley, U. S. Geol. and Geogr. Surv. Terr., Bull. 3, 1877, 682 

 (Wolf Creek, Indian Territory). — Dalgleish, Bull. Nuttall Orn. Club, v, 

 1880, 141 (4 British rec). — Newton and Newton, Handb. Jamaica, 1881, 

 110. — CuBAS, Cuadro Geogr., Estadlstico, Descr. e Hist, de los Estados 

 Unidos Mexicanos, 1884, 173 (common names, Mexico). 



Nmiclerus (Nauclerus) furcatus Kaup, Mus. Senckenb., iii. Heft 3, 1845, 258. 



Elanoides Furficatus Beristain and Laurencio, Mem. y Rev. Soc. Cient. 

 "Antonio Alzate," vii, Nos. 7-8, 1894, 224 (Tehuantepec, Mexico; rare). 



ELANOIDES FORFICATUS YETAPA (Vieillot) 



South American Swallow-tailed Kite 



Adults. — Similar to E. f. forficafus, but with tho scapulars and 

 interscapulars glossed with dark ivy green. 



Immature. — As in E. f. forficatus, but with the same difference as 

 in adults with regard to the scapulars and interscapulars. 



Doumy young. — As in E. f. forficatus. 



Adult male.— Wing^ 405-447 (418.2); tail 298-330 (318.4); culmen 

 from cere 19-20 (19.6); tarsus 31.5-33 (32.4); middle toe without 

 claw 28-29.5 (28.8 mm.) (26 males). 



Adult female. —Ys'mg 390-427 (410.9); tail 275-326 (304); culmen 

 from cere 19.5-21 (20.2); tarsus 32-33.5 (32.3); middle toe without 

 claw 28-30 (28.9 mm.) (14 females). 



Range. — Northeastern Argentina (Misioncs), Paraguay, BoHvia, 

 and southern Brazil north in the low tropical regions to Chiriqul, 

 western Panama, Costa Rica, Nicaragua (Rio Escondido), Honduras 

 (Segovia River), British Honduras (Belize), Guatemala (Finca 

 Sepacuite), and Mexico (Campeche). Known so far in Central 

 America only as a summer visitor, probably absent in winter. 



Type locality. — Paraguay. 



F ale furcatus (not of Linnaeus) Daudin, Trait6 d'Orn., ii, 1800, 152, part (Peru). 



Nauclerus furcatus Lesson, Traite d'Orn., 1831, 73, part (Brazil). — Hartlatjb, 

 Index Azara's Apunt., 1847, 57; Journ. fiir Orn., 1857, 41 (Mattogrosso, 

 Brazil).— Cabanis, in Scliomburgk's Reis. Brit. Guiana, iii, 1848, 735; Journ. 

 fur Orn., 1874, 229 (Brazil).— Bonyan, Proc. Zool. Soc. London, 1851, 

 57 (Brit. Guiana; habits). — Des Murs, in Castelnau's Exped. Am6r. du 

 Sud., Ois., 1855, 10 (Rio Grande, Cuyaba, and Mattogrosso, Brazil; habits). — 

 Burmeister, Syst. tibers. Th. Bras., ii, 1856, 110.— L^otaud, Ois. Trinidad, 

 1866, 30.— Pelzeln, Orn. Bras., Abth. 1, 1868, 6; Abth. 4, 1870, 398; Ibis, 

 1875, 330 ("Spanish" Guiana).— Salvin, Ibis, 1872, 323 (Chontalcs, 

 Nicaragua). — Berlepsch, Journ. fiir Orn., 1873, 283 (s. Brazil; crit.; geogr. 

 range). — Layard, Ibis, 1873, 394 (Pard, Brazil). — Sclater and Salvin, 

 Proc. Zool. Soc. London, 1873, 303 (Chamicuros, e. Peru; habits) .—Tac- 

 ZANOWSKi, Orn. P6rou, i, 1884, 137.— Goeldi, Ibi.s, 1903, 498 (Rio Capim, 

 ne. Brazil). 



