554 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



the bands reduced to large spots not reaching the edges of the webs in 

 the median pair of rectrices; iris dark brown; cere and base of lower 

 mandible lemon-yellow; orbital space dusky; tarsi and toes dull 

 brownish gray; claws dusky black. 



Natal down. — Body immaculate, light brownish buff, near pale 

 clay color, distinctly paler on the chin and throat and deepening to 

 between clay color and Sayal brown on the crown, back, and wings; 

 head with black facial mask and collar around the nape just as in the 

 adult, but with no white spot on the lower eyelids. The down very 

 dense and soft, more like that of a duclding than a hawk. Soft parts 

 apparently as in adults except that the cere and base of the bill are 

 brownish in dried skins (yellowish in life ?) ; iris said to be dark. 



Adult male.—Wmg 262-307 (278.3); tail 187-232 (212.7); culmen 

 from the cere 22.8-27 (24.9) ; tarsus 58-77 (65.4) ; middle toe without 

 the claw 36-45 (41.2 mm.)." 



Adult jemale.—Wmg 255-305 (279.6); tail 188-242 (216.9); culmen 

 from the cere 22.0-26.4 (24.2); tarsus 59-65.8 (62.0); middle toe 

 without the claw 39-45 (41.7 mm.).^^ 



i?an^e.— Resident from western and south-central Mexico (Sonora- 

 Guirocoba; Sinaloa-MazatUn; Veracruz — Playa Vicente, Tres Za- 

 potes, Paso Nuevo; Tabasco — Santa Ana, Frontera; Tehuantepec; 

 Guerrero; Oaxaca; Jalisco — Beltran, Zapotlan, Volcdn de Colima; 

 Jalapa; Yucatan — Chichen Itzd; Quintana Roo; Puebla Cliietla; 

 Campeche; and Chiapas — Aguacate, Soconusco), south through 

 Guatemala (Quirigud, Hacienda California, Finca El Cipres, Pro- 

 greso, near Puerto Barrios) to Honduras (Yoro) and to El Salvador, 

 where it intergrades with the nominate race. 



Type locality. — Santa Lucia, Rio Hondo, Quintana Roo, Mexico. 



Herpetotheres cachinnans (not Falco cachinnans Linnaeus) Bonaparte, Proc. 

 Zool. Soc. London, 1837, 114 (Guatemala). — Gray, List Spec. Brit. Mus., 

 pt. 1, Accip., ed. 2, 1848, 17, part (Mexico); Hand-list, i, 1869, 31, No. 298, 

 part (Mexico). — Sclater, Proc. Zool. Soc. London, 1857, 201 (Jalapa, Vera 

 Cruz); 1859, 368 (Jalapa), 389 (Playa Vicente, Veracruz); — Moore, Proc. 

 Zool. Soc. London, 1859, 52 (Omoa, Honduras; habits). — Sclater and 

 Salvin, Ibis, 1859, 215 (Guatemala); Proc. Zool. Soc. London, 1870, 838 

 (coast Honduras); Nom. Av. Neotr., 1873, 122, part (Central America, 

 part). — Salle and Parzudaki, Cat. Oiseaux Mexique, 1862, 1 (Mexico). — 

 Sharpe, Cat. Birds Brit. Mus., i, 1874, 278, part (Me.xico, Honduras); 

 Hand-list, i, 1899, 264, part. — Lawrence, Mem. Boston Soc. Nat. Hist., ii, 



1874, 300 (Mazatldn, Sinaloa; habits; notes); U. S. Nat. Mus. Bull. 4, 



1875, 41 (Tapana and Tehuantepec City, Oaxaca; habits; fresh colors of 

 unfeathered parts). — Ridgway, U. S. Geol. and Geogr. Surv. Terr., ser. 2, 

 Bull. 2, 1876, 137, part (Mazatldn; Tehuantepec). — Boucard, Proc. Zool. 

 Soc. London, 1883, 457 (Yucatdn). — Cubas, Cuadro Geogr., Estadistico, 



" Twenty-three specimens from Mexico, Guatemala, and Honduras. 

 " Thirteen specimens from Mexico and Guatemala. 



