THE GREENISH WARBLER. 307 



stripe white, are very distinct from Ph. t. trochilus. As summer 

 advances most examples become by abrasion pale brown on upper- 

 parts with a tinge of green on wings and rump and white on under - 

 parts. 



Nestling. (Not examined). 



Juvenile. Like that of Ph. t. trochilus but apparently less 

 yellow on under -parts (only one examined.) 



First winter. Apparently less yellow on under-parts than 

 first winter, and thus resembling adult winter Ph. t. trochilus. 



Measurements and structure. <$ wing 68-72 mm., tail 50-54, 

 tarsus 19-21, bill from skull 10-11 (16 measured). $ wing 62-67. 

 Wing and tail of male thus averaging longer than in Ph. t. trochilus. 

 Wing-formula as in Ph. t. trochilus but 2nd between 5th and 6th 

 in all specimens examined. 



Soft parts. As in Ph. t. trochilus. 



BREEDING-HABITS. Similar- to those of British breeding form. 

 Eggs. Usually 5-7, generally of light freckled type. Average 

 of 21 eggs, 15.5 x 12.2 mm. Breeding -season. Latter half of 

 June or early July. 



FOOD. Similar to that of typical form, but diptera (mosquitoes) 

 form main food in breeding-season. 



DISTRIBUTION. Great Britain. Passage-migrant, having been 

 detected usually in small numbers in spring (end April and May) 

 in Isle of Wight, Sussex, Kent, Norfolk, Yorks, Bardsey (Carnarvon), 

 Kirkcudbrightshire, Wigtownshire, Bass Rock (Haddington), Isle 

 of May, Shetlands (Fair Isle sometimes in large numbers). In Sept. 

 once in Norfolk and Yorks, three times on Bardsey, in Oct. once in 

 Norfolk, in Nov. once on Isle of May. Probably regular passage- 

 migrant in autumn but overlooked owing to difficulty of identifica- 

 tion. 



DISTRIBUTION. Abroad. North-east Russia and Siberia, at least 

 to River Kolyma. Once obtained in Bering Sea. On migration 

 in Roumania, and apparently wintering in Africa. Often difficult 

 to distinguish, therefore distribution not well known. 



PHYLLOSCOPUS NITIDUS 



128. Phylloscopus nitidus viridanus Blyth THE GREENISH 

 WARBLER. 



PHYLLOSCOPUS VIRIDANUS Blyth, Journ. As. Soc. Bengal, xii, p. 967 



(1843 Calcutta and Nepal). 



Phylloscopus viridanus Blyth, Saunders, p. 65. 



DESCRIPTION (Plate 11). Adult male and female. Winter. 

 Whole upper-parts olive-green tinged brown, upper tail-coverts 

 usually rather browner than rest of upper-parts ; lores blackish, 



x 2 



