270 G HE LID ON 



number, are pure white, rather elongated in shape, tapering* 

 towards one end, and average about 0'75 by 0*55. Two broods 

 are raised in the season, and, exceptionally, three. 



397. SUBSP. CHELIDON LAGOPODA. 



Chelidon lagopoda (Pall.), Zoogr. R. As. i. p. 532 (1811) ; Tacz. F. O. 

 Sib. O. p. 184 ; David and Oust. Ois. Chine, p. 130 ; C. lag opus, 

 Sharpe, Cat. B. Br. Mus. x. p. 93 ; Gates, F. Brit. Ind. Birds, ii. 

 p. 270. 



ad. (Siberia). Differs from C. urbica in having all the upper tail- 

 coverts white, the under wing-coverts and axillaries are much darker and 

 the tail is only slightly forked. Culinen 0*32, wing 4*4, tail 2'15, tarsus 

 0*45 inch ; outer rectrices 0'35 longer than the middle ones. 



Hob. Siberia from the valley of the Yenesei to Dauria ' r 

 N. China, Manchuria, Mongolia, and Turkestan ; wintering in 

 South China and Burma. 



In habits it does not differ from C. urbica, and makes a nest 

 like the nest of that species, but differing somewhat in the form 

 of the entrance hole. The eggs, which are pure white, are 

 undistinguishable from those of 0. urbica. When on the wing 

 the present species is said to utter a harsh note like that of 

 Cotile riparia. 



398. SUBSP. CHELIDON CASHMIRIENSIS. 



Chelidon cashmiriensis, Gould, P.Z.S. 1858, p. 356 ; David and Oust. Ois, 

 Chine, p. 539 ; Sharpe, Cat. B. Br. Mus. x. p. 90 ; Gates, F. Brit. 

 Ind. Birds, ii. p. 269 ; Giglioli, Faun. Ital. p. 187. 



<$ ad. (Himalayas). Differs from C. urbica in being somewhat smaller 

 and in having the tail less forked. Culmen 0*3, wing 4'0, tail, 2*1, tarsus 

 0'5 inch ; outer rectrices only, 0'25 longer than the middle ones. 



Hob. The Himalayas from Kashmir to Sikhim, Mongolia; 

 wintering on the plains of India. Is said to have occurred once 

 in Italy. 



In habits it does not differ from C. urbica, of which it is 

 a closely allied subspecies. It breeds in the Himalayas and 

 Kan-su, building a low cup-shaped nest of mud, with a largish 

 aperture, and depositing 4 to 5 white eggs, which closely 

 resemble those of C. urbica. 



