STERNIN A. 4.27. 
~ Summer plumage.—Entire head, neck, upper back, rump, upper 
tail-coverts, entire lower parts and tail, white, tinged with rosy, 
except on the head, when the rosy tint is scarcely perceptible ; 
mantle, secondaries, tertiaries, lesser and median wing-coverts, 
and the upper greater-coverts, also the wing-lining, pale bluish 
french-grey, rather pearly-grey on the back and tertiaries ; four 
or five of the primary-coverts and edge of the wing white ; pri- 
maries, the first white, except the outer web, tip and margin of . 
the inner web; secondaries to fourth primaries’ white, the 
margins of their outer webs narrower and decreasing in extent 
terminally, and broadening andrunning up basally on their inner 
webs, with the black tips broader successively ; fifth and sixth 
primaries tipped white ; the outer web of the fifth greyish, and 
that of the sixth slightly darker with a subterminal dark band. 
Very common during winter in the Kurrachee Harbour and 
adjoining coast. 
Genus, Hydrochelidon, Boie. 
Bill rather long, slender, very gently arched on the culmen ; 
gonys with the ascending portion short ; tail short, slightly 
forked ; tarsus moderate ; feet not fully webbed. 
Hydrochelidon hybrida, Pall. 
984.—H. indica, Steph.—Jerdon’s Birds of India, Vol. IT, p. 837 ; 
Butler, Guzerat ; Stray Feathers, Vol. IV, p. 32 ; Deccan, Stray 
- Feathers, Vol. IX, p. 440; Murray’s Vertebrate Zoology of 
Sind, p. 323. 
THE SMALL MaArsH TERN. 
Length, 10 to 11; expanse, 29 ; wing, 8°5 to 9; tail, 3°5 ; tarsus, 
1; bill at front, 1:12. 
Bill lake-red ; irides brown ; feet dull red. 
In summer plumage, the head and nape black ; lores and a 
broad line through the eyes, white ; back of neck, mantle, wings 
and tail, darkish-grey ; chin, cheeks, and sides of neck, very pale 
grey, deepening on the breast ; abdomen dull black ; under tail- 
coverts white. 
In winter plumage, the forehead and round the bill white; top 
of head and nape more or less black, or dusky, edged with white ; 
the whole lower parts white ; bill dusky lake ; feet dingy lake. 
The young have the head brownish, dusky on the occiput, and 
the usual mottled plumage above ; primaries dark ashy; the 
bill dark brown, reddish atthe base ; feet fleshy brown. 
The Whiskered or Small Marsh Tern is not uncommon during 
the cold season. 
SusB-FAMILY, Sternine. 
Bill long or moderate, entire, straight, compressed and pointed ; 
the lower mandible angled ; nostrils longitudinal ; wing long and 
