552 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



HERPETOTHERES CACfflNNANS CHAPMANI Bangs and Penard 



Mexican Laughing Falcon 



Adult (sexes alike). — Forehead, crown, occiput, hind neck, sides of 

 neck, chin, throat, breast, abdomen, sides, flanks, thighs, and under 

 tail coverts, and longer upper tail coverts whitish suffused with 

 cartridge buff to ivory yellow and to pale yellow-orange, the feathers 

 of the forehead, crown, and occiput with black shaft streaks, those of 

 the thighs usually slightly darker than the abdominal ones and 

 occasionally sparsely spotted with very small clay-colored marks, the 

 feathers of the breast usually averaging darker than those of the 

 throat or abdomen; posterior half of the lores, the circumocular area, 

 cheeks, auriculars, and a dorsal extension of the latter forming a well- 

 marked nuchal band, black, the collar or nuchal band leaving an 

 equally well defined and much broader whitish buff collar posterior 

 to it; scapulars, interscapulars, upper wing coverts, back, rump, and 

 shorter upper tail coverts dark fuscous to fuscous-black, edged (in 

 fresh plumage) with vinaceous-cinnamon ; remiges externally dark 

 fuscous, narrowly tipped (in fresh plumage) with vinaceous-cinnamon 

 and very narrowly edged with the same on the outer web, all but the 

 terminal portion of the inner webs and basal part of outer webs 

 largely ochraceous-salmon, blackening toward the tips of the feathers, 

 and paling to pale ochraceous-buff basally, the inner webs crossed by 

 six dark fuscous bands which narrow toward their inner ends; these 

 dark bands incomplete on the secondaries where they fail to reach 



and Chiquitos, Bolivia); Pelzeln, Orn. Bras., Abth., i, 1868, 7; Abth. 4, 1870, 

 398; Gray, Hand-list, i, 1869, 31, No. 298, part (Bolivia); Ridgway, Proc. 

 Boston Soc. Nat. Hist., xvi, 1873, 52 (Brazil) ; U. S. Geol. and Geogr. Siirv. Terr., 

 ser. 2, Bull. 2, 1876, 137, part (Brazil) ; Sharpe, Cat. Birds Brit. Mus., i, 1874, 278, 

 part (Mexiana Island); Hand-list, i, 1899, 264, part (South America, part); 

 Forbes, Ibis, 1881, 353 (Aguas Bellas, Serto6s, Brazil); Gurney, List Diurn. Birds 

 Prey, 1884, 14, part; Cat. Birds Prey, 1894, 18, part; Berlepsch, Journ. fur Orn., 

 1887, 122 (Paraguay); Kerr, Ibis, 1892, 142 (lower Rfo Pilcomayo, Argentina; 

 habits; food; notes); Salvadori, Boll. Mus. Zool. Torino, xii, 1897, 29 (Caiza, s. 

 Bolivia); xv, 1900, 13 (Urucum, Matto Grosso, sw. Brazil); Holmberg, Segundo 

 Censo Argent., 1898, 507; Salvin and Godman, Biol. Centr.-Amer., Aves, i, 1901, 

 112, part (Brazil; Paraguay) ; Ihering, Rev. Mus. Paulista, vi, 1904, 338 (Paraguay) ; 

 Hagmann, Zool. Jahrb., 1907, 22 (Mexiana Island); Ihering and Ihering, Aves 

 Brazil, 1907, 95 (Goyaz; Matto Grosso; Santar^m; Pard; Bahia; Minas Gerais); 

 Reiser, Denkw. Mat.-Nat. Kaiserl. Akad. Wiss. Wien, 1910, 89 (Barrinha, Rio 

 Preto, ne. Brazil); Dabbene, Orn. Argentina, 1910, 247 (Misiones; Chaco; Pilco- 

 maya); Bol. Soc. Physis Buenos Aires, i, 1913, 303 (Chaco, Argentina): Brabourne 

 and Chubb, Birds South Amer., i, 1912, 71, part (Paraguay; Bolivia?); Bertoni, 

 Fauna Paraguaya, 1913, 43. — Herpetotheres cachinnans querihimdus Bangs and 

 Penard, Bull. Mus. Comp. Zool., Ixiii, 1919, 23 (Pernambuco, ne. Brazil; coll. 

 Mus. Comp. Zool.): Swann, Synop. Accip., pt. 3, 1922, 124 (Pernambuco, Brazil, 

 to Paraguay); Monogr. Birds Prey, ii, 1933, 128 (monogr.) ; Wetmore, U. S. Nat. 

 Mus. Bull. 133, 1926, 98; Peters, bheck-list Birds of World, i, 1931, 276. 



