THE BIRDS OF NORTHERN THAILAND 71 



HIERAAETUS KIENERII FORMOSUS Stresemann 



Southern Rufous-bellied Hawk Eagle 



Hieraaetus kieneri formosus Stresemann, Orn. Monatsb., vol. 32, 1924, pp. 108- 



109 (North Celebes.) 

 HieraaMus kieneril kienerii, Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 193G, 



p. 76 (Doi Suthep). 



The rufous-bellied eagle seems to be a bird of considerable rarity in 

 Thailand. I have three sight records for the species: One at 5,500 

 feet on Doi Suthep, February 1, 1936; one at 4,000 feet, February 6, 

 1937, on the same mountain; one in the foothills to the south of 

 Suthep, February 15, 1936. The only northern Thai specimen was 

 taken by the Asiatic Primate Expedition in 1937 on Doi Ang Ka; 

 the data for this bird have not yet been published. 



The adult has the long, narrow crest feathers, the sides of the head, 

 and the entire upperparts black; the throat white, with a few black 

 streaks at each side; the remaining underparts bright rufous, with 

 black shaft streaks; the under wing coverts rufous; the rest of the 

 underwing barred blackish and gray, but a large area at the center 

 pale gray, the bars being obsolescent; the tarsi feathered. The im- 

 mature is quite different and entirely lacks rufous coloration. 



All Thai birds probably belong to the southern race, formosus, 

 which is distinguished from the typical form (Himalayas) only by 

 smaller dimensions. Stresemann states that the wing length of 

 kienerii varies from 356 (male) to 444 mm. (female) ; of formosus, 

 from 324 (male) to 382 mm. (female). James C. Greenway, Jr., of 

 the Museum of Comparative Zoology, has informed me in a letter that 

 the Ang Ka specimen is a female with a wing length of 369 mm. 



AQUILA RAPAX VINDHIANA Franklin 



Indian Tawny Eagle 



Aquila Vindhicma Franklin, Proc. Comm. Sci. Corr. Zool. Soc. London, 1830-1831 



[=1831], p. 114 (Vindhya Hills, central India). 

 Aquila rapax vindhiana, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 1929, 



p. 577 (Chiang Mai). — Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 1931, 



p. 165 (Chiang Mai) ; 1936, p. 77 (Chiang Mai). 



A female taken by de Schauensee at Chiang Mai, December 20, 

 1928, constitutes the only definite record for the tawny eagle in 

 Thailand. 



This specimen had the apical half of the maxilla horny black, the 

 basal half olive-gray; the mandible olive-gray, tipped black; the cere 

 olive-yellow ; the toes yellow ; the claws black. 



