^l^gj^^] THAYER AND BANGS — BIRDS 39 



A young male, collected by Koren at Kruzgamepa, Alaska, Aug. 

 30, 1913, affords the following measurements: wing, 99; tail 

 (feathers) 55; tarsus, 27; exposed culmen, 11 mm. 



Sylviidae. 

 Locustella lanceolata (Temm.). 



Two adult males were shot at Nijni Kolymsk on June 10, 1912. 



This species occurred sparingly in willow-grown swamps within 

 the tree limit at Kolyma. The male could always be heard, sing- 

 ing from a bush his harsh one-tone song, resembling that of a grass- 

 hopper. 



Phylloscopus trochilus eversmanni Bp. 



Seven specimens, adults of both sexes, Nijni Kolymsk, June 1 to 

 June 21, 1912. 



The Eastern willow warbler was very common within the limit 

 of trees in the Kolyma River region. It arrived at Nijni Kolymsk, 

 on May 30, 1912. 



On June 12, 1912, a nest was found built into the side of a grass- 

 grown turf, in a small swamp in larch forest. It then contained 

 one egg, and was sparsely lined with a few white ptarmigan feathers. 

 The nest was visited again on June 17, and was found to contain 

 five eggs and was then very thickly lined with feathers, and the 

 female bird was still carrying feathers to the nest. She was shot, 

 and skinned, and one more egg was found in the oviduct. 



On comparing these birds with West European specimens, and 

 carefully measuring them, we find but very slight differences, and 

 we quite agree with Hartert's opinion, expressed in ' Die Vogel 

 der paliiarktischen Fauna,' that the subspecies is a poorly marked 

 one. The longest wing in our series of seven, is but 70 mm. 



The eggs measure (in inches) as follows: — .56 X .42; .60 X .43; 

 .61 X .44; .62 X .44; .62 X .45. 



