DEMIEGRETTA.— NYCTICORAX. 199 



(b) Bare part of tibio-tarms less than inner toe and claw. 



Bill without serrations, hut with distinct notch in upper mandible. 



Culmen longer than tarsus. 



Genus DEMIEGRETTA. 



Ornamental plumes fully developed. Full nuchal crest. Doisal train lanceolate, 

 slightly disintegrated. Tarsus longer than mid toe. Adults dark. Young birds 

 ■white. 



215. Demiegretta sacra. Thb Eastern Rbef-Hebok. 



(J 21" to 24". Legs green. Bill yeUowisb. — In summer: Above slate. Head 

 almost black. Pectoral and dorsal plumes lanceolate, slate-grey. Tufted crest 

 about 1". Burma, Andamans, Mcobars, Malay Peninsula, to China, Japan, 

 Australia, and Pacific Isles. Three eggs (1-7 x 1-3), pale sea-greeiL (B. 1564. 

 S.F. ii. 305.) 



Also the genua Agamia. One species — A. agami, 32", bill 5|", above glossy dark green, 

 from Mexico, C. and S. America. 



Culmen equal to the tarsus. 



Genus NYCTIOOEAX. 



vvKTi.Kbpai=a. Nightjar in Aristotle, a Soreech-Owl in the Avihology (xi. 186) ; but strictly 

 a "Night-Raven," from vii+Kbpa^. 



Bill short, stout, with culmen curved. Head crested, with two or three orna- 

 mental nape-j)lumes. Wing rounded. Third quill longest. Tarsus reticulated 

 in front with large hexagonal scales. Tail broad and even. Six powder-down 

 patches. Nearly cosmopolitan. 



216. Nycticorax griseus. Thb Night Heron. 

 Wak, India; Gadri, Sirui; Sannari, Ceylon; Lin-wet, Burma. 



<? 21" to 24". Legs greenish. Bill black. Eye-streak white. Crown, nape, 

 back, and scapulars black, glossed green. Crest of narrow feathers fitting into 

 each other. Cheeks, chin, throat, and abdomen white. C. and S. Europe, Asia, 

 Africa, N. America, W. Indies, India, Ceylon, and Burma. Four or five eggs 

 (1-92 X 1-35), pale sea-green. (J. 937. B. 1568.) 



Also iV. tayazuguira. 2i". Similar to N. griseus, but beneath pale grey. From S. America. 



iV. cyanocephahis. 24". Beneath dark slaty. From south of S. America. 



N. leuamotus. 20". Black above, with white patch on back. From Africa. 



N. caledonicus. 19J". Tail chestnut, eyebrow white. From Australia. 



N. crassirosiris. 22". Similar to N. caledonicus. From Bonin Islands. 



iV. mandibularis. With white throat and no white eyebrow. From Solomon Islands. 



N. mamiUensis. 25". Similar to N. caledonicus, but no white eyebrow. From the Philip- 

 pines and Borneo. 



Also the genus Nyctinassa. With crest of nuchal plumes, dorsal plumes greatly developed, 

 plumage slaty blue. Two species — N. violacea, 22", crown white, from N. and S. America ; 

 and N. pauper, 16", crown black, from the Gralapagos. 



Also the genua Cwncrema. With bill flattened, broader than high. Two species — C. cochlearia, 

 16", the BoatbiU, with throat and chest white, from S. America ; and O. zeledoni, 18", with 

 throat and chest tawny, from 0. America. 



