"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 instead of ocherous. 'Bill bright yellow, tinged with green; culmen black; feet yellowish green; iris golden yellow.' (Everett.)" (Sharpe.) "A single specimen secured by us while with the Steere Expedition has been identified by Grant as Ardetta eurythma." (Bourns and Worcester MS.) Genus DUPETOR Heine and Reichenbach, 1890. This genus appears to be very near Ixobrychus but it may be recognized by the blackish or slate-colored upper parts. 152. DUPETOR FLAVICOLLIS (Latham). BLACK BITTERN. Ardea flavicollis Latham, Index Ornith. (1790), 2, 701. Dupetor flavicollis Sharpe, Cat. Birds Brit. Mus. (1898), 26, 247; Hand-List (1899), 1, 203; Oates, Cat. Birds' Eggs (1902), 2, 133; McGregor and Worcester, Hand-List (1906), 36. Cebu (Bourns & Worcester); Luzon (Heriot); Marinduque (Steere Exp.); Mindanao (Everett, Steere Exp., Goodfellow); Negros (Keay). Celebes, Ceylon, Malay and Indian Peninsulas, Indo-Chinese countries, Greater Sunda Islands, southern and central China.