BIRDS OF NORTH AND MIDDLE AMERICA 345 



BUTEO MAGNIROSTRIS DIREPTOR (Peters and Griscom) 



Guatemalan Insect Hawk 



Adv.It (sexes alike). — Similar to that of Buteo magnirostris griseo- 

 cauda in the color of the iipperparts, but the pale intei'spaces of the 

 basal half or thu^d of the rectrices washed with cinnamon-rufous; the 

 breast darker, the margin of the feathers less buffy, more cinnamo- 

 meous, the light bars on the posterior underparts averaging narrower, 

 iris bright lemon-yellow; cere, edge of gape, tarsi, and feet waxy 

 lemon yellow varjnng to orange-yellow; bill black usually plumbeous 

 toward the base; claws black. 



Juvenal (sexes alike). — Simjlar to that of Buteo magnirostris griseo- 

 cauda, but with the pale interspaces of the rectrices washed with 

 cinnamon rufous, the abdomen barred with rufescent, the ci-own con- 

 colorous with the back; iris orange-brown gradually lightening to 

 orange- yellow when 8 or 9 months old; tarsi, feet, cere, etc., duller 

 and more greenish than in adults. 



Natal down. — Not known. 



Adult wa/e.— Wing 217-238 (225.6); tail 158-168.5 (165.2); culmen 

 from cere 18-20 (19.5) ; tarsus 66-68.9 (66.5) ; middle toe ^\dthout claw 

 30-32.5 (31.5 mm.) (3 specimens). 



Adult female. —V^'ing 231-242 (235.4); tail 169-175 (172.5); culmen 

 from cere 16.5-19 (18); tarsus 63-66 (64.8); middle toe without claw 

 28.5-32 (30.5 mm.) (3 specimens). 



Range. — Resident in eastern Chiapas (Finca Esperanza, Aca- 

 coyagua, Barra de Cahuacdn, Pluehuetan), Guatemala (Puebla, 

 Hacienda Carolina, Ocos, Hacienda California, Finca El Cipres, 

 Puerto Barrios, Santo Toribio, Telemdn, Polochic Valley, Los Amates, 

 etc.), except perhaps the extreme northeastern part (northern Peten), 

 El Salvador (La- Libertad, Lake Olomega, Lake Guija, Rio San 

 Miguel, Rio Goascordn, Puerto del Triunfo, Divisadero, San Sebas- 

 tian, Barra de Santiago, Sonsonate, Hacienda Zapotitlan), south- 

 western British Honduras (Toledo district), and the Pacific slope of 

 Honduras (Tegucigalpa, Monte Redondo, Comayagua, in the forests 

 and semi-wooded areas below 1,500 feet, usually near water). 



Type locality.- — Finca El Cipres, near Mazatenango, Pacific slope, 

 Guatemala. 



Asturina magnirostris (not Falco magnirostris Gmelin) Sclatee and Salvin, Ibis, 

 1859, 217 (Guatemala; food). — Boucard, Liste Ois. Recol. Guat., 1878, 19 

 (Guatemala). 



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

 (Guatemala); Nom. Av. Neotr., 1873, 118, part (Central America, part). — 

 Gurney, List Diurn. Birds Prey, 1884, 72, part (crit.); Cat. Birds Prey, 1894, 

 25, part. 



Rupornis ruficauda Salvin and Godman, Biol. Centr.-Amer., Aves, iii, 1900, 77, 

 part (Santo Toribio, Peten; Teleman, Polochic Valley; Chimalapa, Motagua 



