96 



CHALYBEATE SWALLOW. 



This species builds amongst the rocks and de- 

 serted buildiDgs of Siberia : its nest is of an hemi- 

 spherical shape, and is composed of clay, with 

 a long canal for its entrance : it is a large spe- 

 cies, exceeding the Chimney Swallow in size : the 

 crown is deep purple black : temples ferruginous : 

 low^er part of the beak, and the rump, the same : 

 upper part of the back, base of the wings, and 

 tail -coverts, purple black : the tail black, and 

 greatly forked ; the outer feather very long, and 

 marked with a white spot on the inner web : under 

 parts of the body dirty white, with the shafts of 

 the feathers dusky: legs brown: the patch on 

 the temples frequently extends round the neok^ 

 producing a sort of collar. 



CHALYBEATE SWALLOW. 

 (Hirundo chalyJbea.) 



Hi. nigro-chalyhea suhtus Jusco grisea, rectricibiis nigris. 

 Steel-black Swallow, beneath grey brown, with black tail-fea- 

 thers. 



Hirundo chalybea. Gmel. Syst, Nat, 1. 1026. — Lath. Ind. Orn. 

 2.5/8.2]. 



Hirundo cayanensis. Briss. Orn, 2. 495. 4. t, 46. J'. 1. 

 Hirondelle de Cayenne. Buff, Hist. Nat. Ois, Q, 675,— Buff, 



PI. Enl. 545./. 2. 

 Chalybeate Swallow. Lath. Gen. Syn, 4. 5^4. 22; 



This species is said to be abundant at Cayenne 

 the whole year : it is six inches iu length : beak 



