NANNOCNUS. 181 
151. NANNOCNUS EURHYTHMUS (Swinhoe)- 
SCHRENCK’S BITTERN, 
Ardetta eurhythma Swinnokr, Ibis (1873), 74, pl. 2; MEYER and WIGLEs- 
worRTH, Birds of Celebes (1898), 2, 856, pl. 45. 
Nannocnus eurythmus SHARPE, Cat. Birds Brit. Mus. (1898), 26, 242; 
Hand-List (1899), 1, 203; OatEs, Cat. Birds’ Eggs (1902), 2, 133; 
McGrecor and WorcESsTER, Hand-List (1906), 35. 
Mindanao (Bourns & Worcester); Negros (Keay). Eastern Siberia, China, 
Japan, Borneo, Celebes. 
“Adult male——Above chestnut-brown ; lesser wing-coverts and feathers 
round bend of wing also chestnut-brown; alula-feathers chestnut, outer 
ones blackish internally, with white on the outer margins; remainder of 
wing-coverts olive-clay-color, ashy near the ends of the feathers, innermost 
greater-coverts chestnut like scapulars ; innermost secondaries also washed 
with chestnut, remainder of quills and primary-coverts ashy brown, paler 
at the tips, which are fringed with whitish, the first primary margined 
with ocherous; tail dark brown; crown and nape dusky brown; sides of 
face, ear-coverts, and neck-frill maroon; a broad band of white running 
from the middle of the cheeks down the sides of the neck; fore part of 
cheeks, throat, and under surface of body ocherous-buff; under tail- 
coverts, under wing-coverts, and axillars white; on the throat some shght 
indications of longitudinal dusky spots; feathers of the fore neck elon- 
gated; on each side of chest a patch of black feathers with ocherous 
margins. ‘Bill blackish brown on culmen, yellowish brown on the rest, 
darker on the sides of upper mandible near tomia, light on sides of lower 
and on gonys; cere and bare skin round eye purplish flesh-color, ringed 
with green; legs and toes grass-green, yellow near the tarso-tibial joint 
and on the under surface of the tarsus; soles clay-colored; claws light 
yellowish brown; iris straw-color. (Swinhoe.) Length, 305; culmen, 
50; wing, 150; tail, 39; tarsus, 51. 
“Adult female.—Different from the male. Dusky reddish brown, 
spotted all over with ocherous-buff, the feathers externally spotted or 
notched with this color; wing-coverts like the back, but largely edged 
and spotted with ocherous; head like the back; sides of face dull chestnut, 
with a band of white from the hinder cheeks down the sides of the neck; 
under surface of body ocherous-buff, plentifully streaked with blackish 
brown, tinged with rufous; the lower abdomen and under tail-coverts 
whiter; under wing-coverts deep ocherous, with ashy bases; a patch of 
brown feathers at the sides of the breast, all edged with ocherous. Length, 
305; culmen, 49; wing, 140; tail, 29; tarsus, 48. 
“Young.—Like the old female, but blackish brown above, the wing- 
_coverts maroon-chestnut, and all the upper parts spotted with white in- 
