Lost British Birds. The species described as lost in this paper, are those which were summer residents and brecders, or inhabitants all the year round, of some part of Great Britain, but which no longer breed in this country and visit our shores only as rare stragglers, or, bi-annually, in their migrations to and from their breeding areas on the continent of Europe. In other words, if the British race be extinct the species is here regarded as lost, however abundant it may be elsewhere. Perhaps it would be safer to say . Since I haye included species of which one or two pairs are stilI known to breed within the kingdom.