434 TEN YEABS IN SWEDEN. 



ash grey ; a long red-brown spot on the front of the throat ; 

 here and there speckled with white. 



The black-throated diver is difficult to distinguish in this 

 dress from the red-throated, but in the former the head and 

 back of the neck is blue-grey unspotted, the upper plumage 

 has a more blue-grey tinge, and there is a broad brown 

 band stretching down from the rump to the thighs, more- 

 over the size of the birds, and the shape of the beaks, will 

 serve as distinguishing marks. 



The red-throated diver is much the most common in 

 Lapland during the summer, but not nearly so as the 

 black-throated in the midland districts. 



Both these divers are said to cover up their eggs when 

 they leave the nest, like the grebes. I do not deny that 

 it may sometimes be so, but it is not always the case, 

 for in all the nests that I have taken, I have found the 

 eggs bare. 



Alcidce. 

 With only three toes ; breed by. the sea coast. 



Gen. Una, Briss. 



Beak sharp and straight, as broad as high at the root ; 

 upper mandible convex, with a small hooked point ; nostrils 

 basal, covered by the feather ridge, which extends out 

 on the beak ; legs short ; no hind toe ; front toes webbed ; 

 tail short ; wings short ; first feather longest. 



294. UEIA TEOILB, Tern. Sill Grisla. The Guillemot. D. F. 



Secondaries white at the points, which forms a white 



stripe across the black wing ; length 1 ft. 5 in ; carpus 



7-|- in. ; beak from gape 2 in 51. long, at the middle 



1-i 1. broad, and 3-- 1. high ; tarsus 1 in. 4 1. ; eye small, 



brown ; beak and toes pale brown ; tail twelve feathers; 



shafts of the outer primaries white. 



Summer : head and neck black, tinged with soot brown; 



back and wings, as well as all the upper parts, except the white 



streak on the wing, black, tinged with grey ; all the under 



parts pure white. 



