Page:Rothschild Extinct Birds.djvu/216

 is to be feared that birds shot now on Martha's Vineyards Island may have blood of T. americanus in them, the two forms being closely related, somewhat difficult to distinguish, and evidently sub-species of each other. Nevertheless, a bird taken in 1901 was pronounced to be typical cupido by Mr. Brewster.

From these facts it is pretty clear that the Heath Hen is among the birds the fate of which is sealed, and which, if not already exterminated or mixed with foreign blood, will soon have disappeared. The footnote in the Proceedings of the IV. International Ornithological Congress, p. 203, is herewith corrected.