TEENS. 391 



giving the egg a lighter appearance than that of any- 

 other tern. 



221. S. CANTIACA, Gm. Kentska Tarna. The Sandwich 



Tern. D. F. 



Beak small,, long, black, with a yellow tip ; legs and 



feet black; tarsus ITT *&> tail deeply cleft, shorter 



than the wings; length 17 in. ; the longest tail feathers 



5 in. ; beak from gape 2-f- in. ; iris dark brown. 



Summer : head black ; mantle, wings, and tail ash-blue ; 



all the under parts white ; first wing feather black, with a 



white shaft, and a broad white inner edge ; the rest more 



grey ; the outer tail feather with a grey spot towards the 



point. In the winter the head is white, spotted with black. 



The young have a shorter, paler beak, and the head and back 



spotted; all the terns are subject to these changes in winter 



and young dress. Is certainly rare in the north. 



222. S. DOUGALLII, Mont. Douglalls Tarna. The Eoseate 



Tern. D. 



Beak black, reddish yellow at the root; tail much 



longer than wings ; legs yellow-red ; middle toe longer 



than the tarsus, which is only -J- in. ; the outer fan of 



the first primary black; inner fan grey -white; outer 



fans in all the rest grey- white ; length 1 7 in ; tail 7~ in. ; 



head black ; mantle light blue ; tail white ; under parts 



white, with a beautiful rosy tint on the breast. 



Must be very rare in Scandinavia, although Yarrell states 



that Mr. Dann found it breeding in Lapland. I never saw 



the bird in Lapland, nor did I ever hear of any one who 



had seen it. 



223. S. HIEUNDO, L. Fisk Tarna. The Common Tern. 



D. F. 



Beak red, with a black tip ; legs red ; tarsus 61.; 

 the grey streak on the inner fan of the first primary at 

 2-i- in. from the tip, 2 1. broad ; head black ; mantle and 

 tail (which is deeply cleft, and of about the same 

 length as the closed wings) light ash-blue ; cheeks and 



