250 
BLACK-WINGED TERN. 
feathers, which are white, with dark cinereous tips ; 
this latter colour extends, on the inner web, to about 
one-third its length. The shafts of the quills on 
their inner surface are white, and the inner webs 
have on this side a white margin. The feet are 
short and deep black. 
Total length, 15 inches ; bill, gape, 2^ ; front, 
1 t 7 5 ; wings, 10 ^ ; tail beyond, 1 | ; from the base, 
7\ ; tarsus, i 7 o y middle toe and claw, l T e CT ; hinder 
ditto, T % ; inner ditto, A- 
SENEGAL TERN. 
Sterna Senegalensis, Swains. 
Bill and feet red ; crown and nape black ; plumage above 
light cinereous, beneath much paler ; chin, sides of the 
head, and part of the throat, pure white ; wings ten inches, 
rather longer than the tail. 
Were it not that we possess no less than four dis- 
tinct Terns, which might all pass for the S. fdrundo 
of authors, we should have been tempted to have 
added this to the number ; the more so, because, at 
this moment, we have not an authentic British spe- 
cimen of that well known species to consult. Its 
description, however, as given by M, M. Temminck 
and Selby, although in general applicable to our 
Senegal bird, is not strictly so, and we shall there- 
