290 SWALLOW. 



and one-eighth long, the outer one inch and three quarters, and 

 commonly marked with a white spot on the inner web ; legs rather 

 large, dusky brown. 



The female chiefly differs, in the tail being shorter, and the 

 markings about the head more obscure; wings and tail nearly even. 



Inhabits Siberia ; builds in high rocks of the Altaic Chain, and 

 beyond the Lake Baikal, though sometimes in deserted edifices in 

 ruins : the nest made of clay, large, hemispherical, with a long- 

 narrow canal, like a neck, for entrance. 



A. — In the drawings of Sir J. Anstruther is one of these, with 

 no spot on the outer tail feathers ; and called Dayabaree. I have 

 also observed the same in the drawings of General Hardwicke. 



13— AOONALASCHKAN SWALLOW. 



Hirnndo Aoonalaschkensis, Ind. Orn. u. 577. Gm. Lin.i. 1025. Vieill. Am.\. p. 64. 

 Aoonalaschkan Swallow, Gen. Syn. iv. 571. Shaw's Zool. x. 117. 



LENGTH four inches and a half. Bill short, dusky ; plumage 

 above dull black, not glossy ; beneath, and sides of the head, dusky 

 ash-colour, the last darker; rump dirty white; tail forked, each 

 feather round at the end ; legs dusky. — Inhabits Aoonalaschka. 



14.-CRAG SWALLOW. 



Hirundo inontana, Ind. Orn. ii. 576. Gm. Lin. i. 1020. Gerin. iv. 409. 2. 



Hirundo rupestris, Ind. Orn. ii. 576. Gm. Lin. i. 1019. Scop. Ann. i. No. 253. Tern. 



Man. p. 430. 

 Hirondelle grise des rochers, Bnf. vi. 641. Faun. arag. 91. 

 Rock Swallow, Gen. Syn. iv. 569. 

 Crag Swallow, Gen. Syn. iv. 570. Shaw's Zool. x. p. 102. 103. 



LENGTH five inches and a half. Bill black ; plumage above 

 like that of the Sand Martin ; quills and tail grey brown, with rufous 



