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220e. Spilornis cheela floweri Swann, Syn. List Siam. 
Accipitr., p. 81 (1920). [Tahkaman, Siam, 
type in Brit. Mus.) 
Siamese Serpent-Eagle. 
Wing (ad. unsexed) 411-424 mm.; much 
paler above and below; wings strongly 
shaded with grey ; sides of head slate grey ; 
throat uniform with chest which is pale 
ashy brown,slightly vermiculated; chest also 
sparingly spotted with white like lower parts; 
tail brownish black, with brownish white 
median band and remains of a basal one; 
primaries with one black median band 
below, besides terminal one ; under wing- 
coverts rufous, with white spots, outer 
edges white. 
220f. Spilornis cheela ricketti W. Sclat., Bull. S. China to 
B.O.C.,_ xl., p. 37 (1919). [Yamakan, Upper Burma 
Fokien Prov., type in Brit. Mus. coll. | (Chindwin dist.) 
Chinese Serpent-Eagle. 
‘“ Resembling S. c. cheela, but with upper 
parts somewhat paler ashy brown, with a 
purplish gloss, below dusty ashy; trans- 
verse banding on breast indistinct, often 
not noticeable ; throat never black, but 
like the breast, cheeks and ear-coverts grey, 
not black ; slightly smaller wings, measur- 
ing from 430 to 470 mm.’’—W. Scrat. 
220g. Spilornis cheela hoya Swinhoe, Ibis, 1866, Formosa. 
p. 304. [Formosa.] 
Formosan Serpent-Eagle. 
Nearly as large as S. cheela cheela, wing 
470-481 mm.; darker above and below ; 
tail with the central pale band narrower ; 
throat and ear-coverts blackish brown ; 
chest nearly uniform brown, but showing 
