BIRDS OF NORTH AND MIDDLE AMERICA 341 



1930, 40 (habits; Veracruz). — Bangs, Bull. Mus. Comp. Zool., Ixx, 1930, 



190, part (type specimen in Mus. Comp. Zool.). 

 Asturina ruficauda, Sclater and Salvin, Proc. Zool. Soc. London, 1869, 133, 



part (C6rdoba and Jalapa, Veracruz; Mexico City); Nom. Av. Neotr., 1873, 



118, part (Mexico part). 

 Rupornis ruficauda Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1900, 76, 



part (Aldama, Altamira, and Tampico, Tamaulipas; Alvarado, Colipa, Vega 



de Cazadero, Codtepec, Huatusco, Hacienda Tortugas, Plan del Rfo, Ufo 



Rancho Nuevo, Santa Ana, San Lorenzo, C6rdoba, and Jalapa, Veracruz; 



Mexico City; Chihuitdn, Amol6ya, and Santa Efigenia, Oaxaca). — Ihering 



and Ihering, Av. Brazil, 1907, 90, part (Mexico part). 



BUTEO MAGNIROSTRIS XANTUSI van Rossem 



Colima Insect Hawk 



Adult (sexes alike). — Similar to that of Bvteo magnirostris griseo- 

 cauda but darker above and below, much less rufescent below, and 

 almost completely lacks the reddish from the inner webs of the remiges. 

 Above dark hair brown to dusky olive brown; breast dark hair brown 

 tinged olive-brown; transverse bars on upper abdomen and sides 

 Saccardo's umber, the ground color more whitish, less tinged with 

 buffy, than in griseocauda. 



Juvenal (sexes alike). — Like that of Buteo magnirostris griseocauda 

 but darker, less rufescent below; the upperparts slightly darker, the 

 pectoral streaks dark clove brown to almost fuscous, the ground color 

 of the underparts less buffy, more whitish. 



Natal down. — Not described. 



Adult wa/e.— "Wing 227-249 (235.3); tail 163-174.5 (167.7); culmen 

 from cere 19-20.8 (19.6) ; tarsus 67-69.1 (68) ; middle toe without claw 

 29-33 (31.3 mm.) (3 specimens, including the type). 



Adult female— Wmg 235-248 (242.5); tail 170-177.5 (174.4); cul- 

 men from cere 16.5-20 (19.1); tarsus 64.5-67.5 (63.6); middle toe 

 without claw 32-34.7 (33.3 mm.) (4 specimens). 



Range. — Resident from Colima (Rio Armeria and Manzanillo) to 

 Guerrero (Acapulco, La Lagunella, and Papayo) and to Puerto Angel, 

 Oaxaca. 



Type locality. — Rfo Armeria, Colima, Mexico. 



A&iurina ruficauda (not of Sclater and Salvin, 18G9) Salvin, Proc. Zool. Soc. 



London, 1863, 426 (Acapulco, Guerrero). — Sclater and Salvin, Nom. Av. 



Neotr., 1873, 118, part (Mexico, part). — Sharpe, Cat. Birds Brit. Mus., i, 



1874, 205, part (s. Mexico).— Salvin, Proc. Zool. Soc. London, 1883, 426 



(Guerrero). 

 Rupornis ruficauda Salvin and Godman, Biol. Centr. Amer., Aves, iii, 1900, 76, 



part (Tacolapa, Guerrero; Acapulco, Guerrero). 

 Buteo {Rupornis) magnirostris c. var. griseocauda Ridgway, Proc. Boston Soc. 



Nat. Hist., xvi, 1873, 88, part (Colima). 

 Buteo (Rupornis) magnirostris var. griseocauda Ridgway, Proc. Boston Soc. Nat. 



Hist., xvi, 1873, 87, part (descr.). 



