376 TRAVELS OF A NATURALIST 



one true Eversmann's Warbler,* the same bird which 

 Seebohm shot on the 12th (not the bird mentioned by 

 me anted which cried ' twosuk '), and which Seebohm 

 described as having a harsher, ' more white-throaty song 

 than the Common Willow Warbler.' At the time we 

 both were struck with the huge broad bill (reminding me 

 of the bill of the birds of the American genus Vireo). It 

 (Eversmann's Warbler) is a very distinct species. This 

 example has a dark centre to the long under-tail-coverts. 



The Siberian Chiffchaff is equally distinct, and may be 

 readily distinguished from our Chiffchaff by its white 

 under-tail-coverts and white belly, and white feathers on 

 the tarsus, which in our bird are distinctly tinged with 

 yellow. 



The song, too, of the Siberian Chiffchaff is prolonged, 

 and Seebohm describes it as ' ching-chivie ching-chivie,' 

 repeated an indefinite number of times, sometimes end- 

 ing with the ' ching,' sometimes with the ' chivie.' 

 We have as yet only secured one female of this species. 



The two Willow Wrens (if they be distinct) are not 

 so easily distinguished, but our series is easily separable 

 into two lots large and small which may be two 

 species. 



The females of the smaller bird are very buff on the 

 breast, but both species seem to be more buff than ours, 

 and remind Seebohm of specimens of the Booted Warbler 

 (Hypolais caligata) which he has seen. The two birds 

 have a song almost if not quite similar. 



The above notes are copied from Seebohm's, and the 

 following measurements may be of service in distinguish- 



* This our solitary specimen when examined at Sheffield by 

 Messrs. H. E. Dresser, Howard Saunders, and H. Seebohm, was 

 determined as the true Phylloscopus eversmanni, and considered to 

 be the same bird as Alston and I obtained at Archangel. Its true 

 name is Phylloscopus borealis, or Eversmann's Warbler. 



