236 



BLACK-THROATED DIVER. 



(Colymbus arcticus.) 



Co. capite cano, collo subtus atro-violaceo, fascia alba interruptd. 

 Diver with the head hoary, the neck beneath dark violet, with an 



interrupted white bar. 

 Colymbus arcticus. Linn. Syst. Nat. 1. 221. Gmel.Syst. Nat. 



1.587. Raii, Syn. 125. Lath. Ind. Orn. 2. 800. 

 Mergus gutture nigro. Briss. Orn. 6. 115. 

 Le Luinme, ou petit Plongeon de la iner du nord. Buff. Ois. 8. 



262. Temm. man. d'Orn. 599. Id. 2 Edit. ii. 913. 

 Black-throated Diver. Edw. Glean.pl. 146. Penn. Brit. Zool. 



2. 241. pi. 85. / 2. Penn. Arct. Zool. 2. 444. Lath. Gen. 



fyn. 6. 343. Lew. Brit. Birds, 6. pi. 229. Mont. Orr>. 



Diet. 1. Bew. Brit. Birds, 2. 195. 

 YOUNG Le grand Plongeon. Buff". PI. Enl. 914. 

 Lesser Imber. Bew. Brit. Birds, 2. 187. 



LENGTH about twenty-eight inches : beak dusky : 

 irides brown : the head and neck are ashy-brown, 

 deepest on the forehead : the throat and fore part of 

 the neck are black glossed with violet : beneath the 

 throat is a straight band, longitudinally rayed with 

 white and black : near the orifice of the ears, and on 

 the sides of the neck, extends a broad band, which is 

 longitudinally rayed with white and black : the lower 

 part of the neck is rayed with black : the breast and 

 the rest of the under parts are pure white : the back, 

 rump, and sides are deep unspotted black : on the 

 edges of the upper part of the back is a longitudinal 

 space, in which the feathers are tipped with white : the 

 scapulars are transversely striped with about a dozen 



