273 



127. Pallas's Grasshopper Warbler, Locustella certhiola (Pall.). 



Plate 34, fig. 16, 17 (Darasun, Dybowski). 



Eggs: Taczanowski, J. f. 0., 1873, Taf. I, fig. 4, 5. Dresser, 

 pi. — , fig. 22—24. 



Locustella certhiola (Pall.). Dresser, B. of Europe, II, p. 633 and Man. 

 Pal. Birds, p. 133. Hartert, Vog. Pal. Fauna, p. 550. 



Breeding Range: Siberia, from Tomsk and the Yenesei E. to 

 the Amur mouth. Has occurred on Helgoland (1856), and the Rockabill, 

 Ireland (Sept. 28, 1908). 



Seebohm found this bird frequenting the marshes and swampy dis- 

 woods in the wide river meadows by the Yenesei, and more recently 

 Johansen has recorded it from Tomsk, while Dr. Theel met with it up 

 to lat. 62° N. It also breeds in the Altai district; in Transbaikalia, 

 where Dybowski obtained eggs, near Irkutsk (Radde), am! according to 

 Przewalski very commonly in Ussuria as well as in the Hoang-ho valley. 



Built close to the ground in a tussock of grass in wet and moss Nest. 

 grown meadows with a growth of long grass. Sometimes it is described 

 as built on a hummock of moss, but well concealed by the grass. It is 

 usually found by the sitting bird flying off close to the feet of the 

 passer by. 



Usually 5, less often 4 or 6 in number. They are thickly covered ^8g»- 

 as a rule with very fine and almost confluent pinkish brown specks, 

 which generally form a zone at the big end, and occasionally a dark 

 hair streak. In some eggs the colour appears to be a uniform brownish 

 pink, perhaps because the ground is completely obscured, but the colour 

 is rather fugitive. 



In the Baikal district from mid June onwards, but in early June Breeding 

 in Ussuria and the Amur, where fledged young were found early 

 in July. 



Average size of 16 eggs (9 by Taczanowski and 7 by the writer), 

 18.88 X 13.76, Max. 19.7 x 14 and 19 X 14.2, Min. 18.3 X 13.3. 



128. Grasshopper Warbler, Locustella naevia (Bodd.). 

 Geographical Races. 



a) Western Grasshopper Warbler, L. naevia naeria (Bv/dd.). 



Plate 28, fig. 18—21 (Germany). 



Eggs: Thienemann, Fortpfl. Tab. XXI, fig. 8, a — c. Hewitson, 

 I Ed. I, pi. LXX, fig. 3; II Ed. I, pi. XXV, fig. 1; III Ed. I, pi. XXXI, 

 fig. 1, Heckel, Naumannia, 1853, Taf. II, fig. 4, 5. Baedeker, Tab. 19, 

 fig. 21. Taczanowski, Tab. XLV. Seebohm, Br. Birds, pi. 10: Col. 



18 



Season. 



Measure- 



