Order PASSERIFORMES. 
No. 448. 
Family MUSCICAPIDM. 
ETHELORNIS CHLORONOTUS. 
GREEN-BACKED FLYEATER. 
(Plate 382.)* 
Gerygone chloronotus Gould, Proc. Zool. Soc. (Lond.), 1842, p. 133, Feb. 1843 : Port 
Essington, Northern Territory. 
Gerygone chloronotus Gould, Proc. Zool. Soc. (Lond.), 1842, p. 133, 1843 ; id., Birds Austr., 
pt. sx. (Vol. II., pi. 102), Sept. 1st, 1845 ; id., Handb. Birds Austr., Vol. I., p. 271, 
1865; Ramsay, Proc. Linn. Soc. N.S.W., Vol. II., p. 183, 1878; id., Tab. List 
Austr. Birds, p. 6, 1888 ; Mathews, Nov. Zool., Vol. XYIII., p. 311, 1912 ; Campbell, 
Emu, Yol. XVIII., p. 182, 1919 (N.T.). 
Acanthiza chloronotus Gray, Genera Birds, Vol. I., p. 189, 1848. 
Pseudogerygone chloronota Sharpe, Cat. Birds Brit. Mus., Vol. IV., p. 229, 1879 ; Campbell, 
Nests and Eggs Austr. Birds, Vol. I., p. 161, 1901 ; Le Souef, Emu, Vol. II., p. 145, 
1903 ; Hall, Key Birds Austr., p. 15, 1906 ; Mathews, Handl. Birds Austral., p. 64, 
1908 ; Hill, Emu, Vol. X., p. 274, 1911 (N.W.A.) ; H. L. White, ib., Vol. XV., p. 62, 
1915 ; id., ib., Vol. XVI., p. 222, 1917. 
Gerygone chloronota darwini Mathews, Austral Av. Rec., Vol. I., pt. 2, p. 40, April 2nd, 
1912 : Parry’s Creek, North-west Australia. 
Gerygone chloronota apsleyi Mathews, ib. : Melville Island, Northern Territory. 
Wilsonavis chloronota Mathews, List Birds Austr., p. 173, 1913. 
Wilsonavis chloronota chloronota Mathews, ib. 
Wilsonavis chloronota apsleyi Mathews, ib. 
Wilsonavis chloronota darwini Mathews, ib. 
Distribution. Northern Territory ; North-west Australia. \ 
Adult male. General colour of the upper-surface, including the entire back, upper tail- 
coverts, and outer aspect of wings yellowish-green ; inner webs of flight-quills 
and tail-feathers pale brown with slightly paler inner edges ; crown of head and 
sides of face earth-grey ; throat and entire under-surface, including the under 
tail-coverts and under wing-coverts greyish silky-white with a tinge of yellow on 
the sides of the body and short under tail-coverts ; thighs grey ; under-surface 
of flight-quills and lower aspect of tail pale brown. Eyes reddish-brown ; feet 
blackish-brown ; bill blackish-brown, with base of lower mandible light brown. 
Total length 103 mm. ; culmen 9, wing 54, tail 37, tarsus 18. Figured. Collected 
on Parry’s Creek, North-west Australia, on the 7th of September, 1908. 
*The Plate is lettered Wilsonavis chloronotus. 
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