the Banks of the Lena River. 41 7 



sun, but the serious disadvantage of vast myriads of mosquitoes 

 which beset us during the whole twenty-four hours nearly 

 every day. Ornithologists who would know more of these 

 parts must of necessity be provided with some defence 

 against the insects that try to impoverish the blood ; many 

 valuable sleeping-hours will thus be saved.] 



III. List of the Species, with Remarks, and avith the 

 Collector's Field-notes. 



1. Sterna longipennis Nordm. 



Sterna longipennis Nordm aim in Erman's Verz. v. Th. u. 

 Pfl. p. 17 (1835 : Mouth of the Kuehtui, near Ochotsk). 



S ad. 200 miles below Yakutsk. " Bill black, extreme 

 tip whitish ; eyes black; legs coral-red." (No. 165.) 



Two young in down, 200 miles north of Yakutsk, i. vii. 

 1903. These two birds (Nos. 11-9, 150) are like the downy 

 young of Sterna fluviutilis. They were erroneously marked 

 as those of Larus ridibundus (!) . " Legs flesh-coloured ; nails 

 blackish; bill deep flesh-coloured with black tip; nail of bill 

 creamy white." 



[Near Yakutsk also we observed what appeared to be this 

 species. Our specimen was one of many that were nesting 

 in a lagoon just off the river.] 



2. Larus argentatus veGjE Palmen. 



Larus argentatus var. veyce Palmen, Vega-Exped., Vetensk. 

 v. p. 370 (1887 : Behring Sea). 



2 S , 1?. Bulun, Lena River, 7. vii., 11. vii. 1903. 

 (Nos. 222, 225, 229.) 



1 ? . Miankiaria River, one of the tributaries of the Lena, 

 22. vii. 1903. (No. 331.) 



" Iris brown ; orbital ring coral-red or deep red ; legs and 

 feet creamy white, with a delicate bluish tinge ; claws deep 

 brown or blackish ; bill yellow, with a large patch of red 

 near the tip of the lower mandible." Wings about 45 cm. 



Larus argentatus vegce is the eastern representative of 

 L. argentatus argentatus. It differs in the colour of the 

 orbital ring and the somewhat darker grey back, and from 



