348 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



thighs ochraceous, narrowly barred with blackish; flanks buffy ochra- 

 ceous, barred with dusky; under tail coverts buffy white to ochraceous, 

 marked with a few speckles or spots of dusky." (Original description 

 by Bond.) 



Other plumages unknown. 



Adult male. — Wing 229; tail 154; culmen from cere 19.25; tarsus 

 58 mm. (1 specimen). 



Adult female. — Wing 231; tail 160; culmen from cere 20; tarsus 59 

 mm. (1 specimen). 



Range. — Resident on the Bay Islands of Spanish Honduras (Bonac- 

 ca, Ruatan; not known from Utila). 



Type locality. — Bonacca Island, Spanish Honduras. 



Asturina ruficauda Salvin, Ibis, 1889, 374, in part (Ruatan and Bonacca Islands). 



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

 part (Bonacca and Ruatan Islands). 



Buieo magnirostris sinus-honduri Bond, Proc. Acad. Nat. Sci. Philadelphia, 

 Ixxxviii, 1936, 355 (Bonacca Island, Spanish Honduras; descr. ; crit.). — Anony- 

 mous, Auk, liii, 1936, 469, in text. 



BUTEO MAGNIROSTRIS PETULANS van Rossem 



Rufous-tailed Insect Hawk 



Adult (sexes alike). — Similar to Buteo magnirostris griseocauda, but 

 paler above and grayer, less brownish, the back decidedly grayish 

 rather than brownish; the pale interspaces of the rectrices entu-ely 

 cinnamon-rufous; the breast nearly uniform pale gray sometimes 

 washed slightly with hair brown or drab, the under wing coverts 

 indefinitely barred with cinnamomeous. 



Juvenal (sexes alil^e). — Similar to that of Buteo magnirostris grise- 

 ocauda, but with the pale interspaces on the rectrices entirely cinna- 

 mon-rufous, and with the abdomen streaked with cinnamon rufous. 



Natal down. — Not known. 



Adult male.— Wing 205-214 (209.8); tail 150-155 (152.6); culmen 

 from cere 18-18.5 (18.3); tarsus 58-60.5 (59.6); middle toe without 

 claw 29-29.8 (29.5 mm.) (4 specimens). 



Adult female. —Wmg 217-234 (224.6); tail 161.5-170.5 (163.8); cul- 

 men from cere 18-19.5 (18.6); tarsus 65-67 (66); middle toe without 

 claw 31-34 (33.1 mm.) (7 specimens). 



Range. — Resident in the Pacific slope of Central America from the 

 head of the Gulf of Nicoya, Costa Rica, through western Costa Rica 

 (Bolson, Boruca, El General) to the mouth of the Tuyra River, eastern 

 Panama (Divala, David, Bogaba, Boquete, Canal Zone). 



Type locality. — Veraguas. 



Asturina magnirostris (not Falco magnirostis Gnaelin) Lawbence, Ann. Lye. 

 Nat. Hist. New York, vii, 1861, 316 (Panama); viii, 1865, 178 (David, Chiri- 



