251. Sterna, saundersi.
THE BLACK-SHAFTED TERNLET.
Male 9 1/10" Legs yellowish olive. Bill yellow, tip dusky. First three primaries black, with black shafts and broad white margins to inner webs. Rump, tail-coverts, and tail grey. Back grey. Triangular frontal patch. Crown velvet-black. Closely allied to S. minuta and S. sinensis. Coasts of Indian Ocean, from S. Africa to Burma and Lower Pegu, Red Sea, and Persian Gulf.
Also S. antillarum. 8 1/2". Legs orange. Bill yellow, tip black. Mantle, rump, and tail grey. First and second primaries black. N. and C. America, visiting W. Coast of Africa.
S. superciliaris. 9". Legs dull yellow. Bill greenish. First, second, third, and fourth quills dusky, with narrow white margins on inner webs of first and second. S. America.
S. lorata. 9 1/2". Legs brownish. Bill greenish, tip dusky. Web between second and third toes considerably indented. Mantle and tail slate-grey. Belly grey. Primaries with white shafts. Coast of Peru.
S. nereis. 10". Legs yellow. Bill yellow, tip dusky. A black spot in front of the eye, and a narrow black ring round the eye. Shafts of outer primaries grey. Forehead and lores white. Below white, Australia and New Zealand.
S. balaenarum. 9". Legs yellow. Bill black. Forehead black to the base of the bill. Shafts of primaries white. Tail grey. Outer rectrices white. S. and W. Africa.
Crown always white.