47 



subtus albis, hypochondriis virescente griseo lavatis : rostro brunneo : iride bruunea : pedibus pallide 

 brunneis. 



? mari similis, sed sordidior. 



8 ptil. Mem. ubique sordidior et virescentior : remigibus secundariis et tectricibus alarum flavicante cervino 

 nee albido apieatis : stria superciliari flavicanti-cervina, et pectore cum hypochondriis pallide flavicante 

 cervino lavatis. 



Adult Male in breeding -plumage (Lake Baikal, May 22). Crown, nape, back, and scapulars greyish olive; 

 rump and upper tail-coverts washed with green ; wings dull dark brown, all the quills, except the inner 

 secondaries, edged with yellowish green on the outer web ; inner secondaries slightly, and larger and 

 median wing-coverts broadly tipped with white, slightly shaded with sulphur- yellow ; rectrices dull 

 dark brown, narrowly edged on the outer web with pale yellowish green ; sides of the face white, 

 intermixed with greyish olive ; from the base of the bill over the eye to the nape a tolerably broad 

 dirty white stripe ; underparts including chin and throat white, on the flanks washed with greenish 

 grey ; bill dark brown ; iris dark brown ; legs light brown. Total length about Si inches, culmen 0"45, 

 wing 2"1, tail 1'7, tarsus 0"7, first primary short, but - 25 longer than the wing-coverts, and 09 shorter 

 than the second, which is - 3 less than the third, third and fourth about equal, being the longest. 



Adult Male in autumn (Darasun, 29th August). Differs from the above-described bird in having the upper 

 parts very much greener, the tips to the wing-coverts and secondaries and the stripe over the eye 

 (which latter is large and clearly developed) being bright sulphur -yellow instead of white ; flanks washed 

 with pale greenish yellow, with but little trace of grey. A specimen shot by Mr. W. E. Brooks, of 

 Etawah, on the 16th October, has the upper parts duller than the bird killed in August above 

 described ; the margins to the wing-coverts and secondaries are dull yellowish buff ; the superciliary 

 stripe is yellowish buff; and the flanks and breast are washed with pale buff with a yellowish tinge. 



Female. Similar to the male, but a trifle duller in colour. 



This small Warbler, which has by so many authors been confused with a closely allied species 

 (Phylloscopus proregulus), is an inhabitant of Asia, and has only been met with on few occasions 

 as a straggler to Europe. Its first recorded occurrence in Europe is that of a specimen obtained 

 in Northumberland in 1838 by Mr. John Hancock, who shot it on the banks near Hartley, on 

 the coast of Northumberland, on the 26th September in that year. Between then and 1845 

 there appears to be no instance of its occurrence in Europe on record ; but in that year two 

 specimens were obtained near Berlin, as recorded by Dr. Cabanis, who says (Journ. fur Orn. 

 1853, p. 82) that late in October 1845 a female was caught by a bird-catcher at the village of 

 Rixdorf, about a German mile from Berlin, and soon after a male was caught by the same 

 individual, the former of which was sold to Fiirst Radziwill, and the latter subsequently came 

 into the collection of Mr. F. Heine. Since then it has been frequently recorded from Heligo- 

 land, where Mr. Gatke obtained eight specimens between 1847 and 1850, nearly all of which 

 were killed by boys with blowpipes ; and he subsequently informed Professor Newton (Yarr. 

 Brit. B. p. 445) that three more specimens were killed in 1859. A bird was caught near 

 Berlin in October 1860, as recorded by Dr. Carl Bolle (J. f. O. 1863, p. 61), which is supposed 

 to have been a Yellow-browed Warbler; but it was not preserved, and therefore there is no 



2q 



