NAN NOON US. 181 



151. NANNOCNUS EURHYTHMUS (Swinhoe). 

 SCHRENCK'S BITTERN, 



Ardetta eurhythma, SWINHOE, Ibis (1873), 74, pi. 2; MEYER and WIGLES- 



WOBTH, Birds of Celebes (1898), 2, 856, pi. 45. 

 Nannocnus eurythmus SHABPE, Cat.' Birds Brit. Mus. (1898), 26, 242; 



Hand-List (1899), 1, 203; GATES, Cat. Birds' Eggs (1902), 2, 133; 



MCGREGOR and WORCESTER, 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 slight 

 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, th'e 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- 



