THE GENUS LATIUS. 
orange spot at tlie protuberance of the lower mandible; 
length 3 inches, depth Jths. Iris pale yellow, angle of 
the mouth bright red, circle of the eyes straw - yellow. 
Legs and feet livid flesh - colour, claws blackish - brown ; 
tarsus 3 inches long, toe 3 inches. Total length 31 inches, 
extent 62. Wings about two inches shorter than the tail. 
Back and upper surface of wings pearl-grey, with a good 
deal of blue. Edge of the wing, a considerable portion of 
the first primaries, and the ends of all the other quills, 
white ; shaft of first primary pure white, of the rest gra- 
dually tinged with ash. The rest of the plumage snow- 
white. Head and neck longitudinally streaked with very 
pale brown, being along the shaft near the end of the fea- 
ther. 
Note. — The dimensions of the above are from a specimen 
in the Museum. As this individual is not perfectly adult, 
having still some pale brown markings on the tail and lower 
neck, and being thus probably a bird of three years, I have 
rectified the description of the plumage by the examination 
of another specimen belonging to Mr Thomas Torrie. 
Both these are from Shetland, and were shot, and presented 
by Mr Edmondston. The dimensions of this latter speci- 
men are, beak 2| inches long, Jths deep ; tarsus 2f , toe S| ; 
total length 28 inches. 
Adult, Summer Plumage, — According to Capt. Sabine, 
whose description agrees with the above, the head and neck 
are pure white. 
Youngs "Beak horn-colour to the fore parts of the nostril, 
the rest brownish-black, length 2|, depth |ths. (Feet flesh- 
colour,) claws lightish-brown ; tarsus 2|, toe 2|. Total 
length 30 inches, extent 60. The general ground-colour of 
the plumage is pale ash-grey, with a little brown and yellow. 
Head and neck marked with longitudinal streaks of very 
