HYPARGOS NITIDULUS 245 
Adult male. Upper parts, including the wing-coverts, outer webs of 
quills and the tail, yellowish green; upper tail-coverts washed with reddish 
orange, remainder of quills and primary-coverts brown, with the inner 
edges of quills whitish; under wing-coverts pale dusky ash, slightly washed 
with greenish yellow; under surface of tail black with broad paler ends; 
entire sides of head and the chin vermilion ; throat greener, strongly washed 
with vermilion; feathers of the chest and front of abdomen dusky ash, with 
broad black ends enclosing a rather large round white subterminal spot on 
each web; remainder of abdomen and the under tail-coverts yellowish 
green. ‘Tris red; bill crimson, with the culmen and basal portion violet 
black ; feet brownish flesh colour.” Total length 4:2 inches, culmen 0°45, 
wing 2:0, tail 1-3, tarsus 0°6. g, August, Bo (Kemp). 
Adult female. Differs in having the upper tail-coverts only slightly 
yellower than the mantle; sides of head and a broad chin-patch sandy buff, 
faintly washed with red ; remainder of throat green, with a wash of yellow 
strongest on the crop. 
Immature. Upper parts more uniform green, sometimes with a dusky 
shade towards the crown; the sandy butf on the sides of the head and the 
chin with no trace of red; remainder of the under parts ashy, and with 
the exception of nestling, mottled, with white-spotted black end to some of 
the feathers on the sides of the breast. Culmen 0-4, wing 1:95 and 2:05, 
tarsus 0:6. Natal (Gordge), Yambuya (Jameson) and Hfulen, ?, 19. 4. 02, 
(Bates). 
The Green-backed Twin-spot ranges southward from Sierra 
Leone and Mombasa into Natal. 
The most northern range known for the species is Sierra 
Leone, where the late Sir H. Sabine procured a specimen, and 
in the same district Mr. Kemp has collected at Bo, in July and 
August, three males and a female. ‘The protective colouring, 
or its shyness, may account for the apparent scarcity of this 
widely distributed species. In Liberia a few specimens have 
been obtained at Robertsport, Junk River and Cape Mount. 
The types of Pytelia schlegeli, apparently an adult male and a 
very young bird, figured “ Ibis,” 1870, pl. 14, were collected by 
the late Governor Nagtglas, in Fantee, in which country it has 
also been procured by Haynes at Accra. Specimens have been 
collected in Togoland by Mr. Baumann at the Misahcéhe Station; 
in Camaroons, at Barombi by Mr. Zeuner, and towards the 
