648 



STERNA DOUGAIXII. MACDOUGALL'S, OR 

 ROSEATE TERN. 



Roseate Tern. Sterna Dougallii. Mont. Ornith. Diet. Supplt. 

 Sterna Dougalli. Flem. Brit. Anim. I. 1 43. 

 Hirondellc-de-mer Dougall. Tcnim. Man. d'Ornith. 11. 738. 

 Roseate Tern. Sterna Dougalli. Selby, Illustr. Brit. Omith. 470. 

 Sterna Dougallii. Jenyns, British Vert. Anim. 265. 

 Sterna Dougalli. Bonap. Comp. List, 61. 



Bill rather longer than the head, slender, black, at the base 

 orange-red ; feet vermilion ; wings about three inches shorter 

 than the tail. Upper part of the head and nape deep black ; 

 back and wings light greyish-blue ; sides of head and hind 

 neck ivhite ; all the lower parts of a delicate roseate tint, 

 fading to white. 



Male in Summer. — Of the same form as the last two 

 species, with the tail more elongated. Bill rather longer than 

 the head, slender, nearly straight, compressed, tapering, very 

 acute. Upper mandible with the dorsal line slightly arcuato- 

 dcclinate, the ridge narrowed toward the end, the sides 

 rapidly sloping, the edges sharp and inflexed, the tip very 

 acute. Nostrils linear-oblong, pervious, a slight groove ex- 

 tending half way beyond them. Lower mandible with the 

 junction of the crura a little beyond the middle, the dorsal 

 line straight, the edges sharp and inflexed, the tip extremely 

 slender. 



The eyes rather small, as are the apertures of the ears. 

 Feet very small, tibia bare for about half an inch ; tarsus 

 very short, slender, somewhat compressed, covered anteriorly 

 with small scutella, elsewhere with roundish scales. Hind 

 toe extremely small, the rest very slender, the third longest ; 

 the membranes with a deep concave margin. Claws arcuate. 



