AOONALASCHKAN SWALLOW. 



117 



feathers : the eggs are grey, spotted with brown, 

 and are two in number : they follow the herds of 

 cattle for the sake of the flies. 



AOONALASCHKAN SWALLOW. 

 (Hirundo unalaschkensis.) 



Hi. nigricans subtus cinerascens, nropygio albido. 



Dusky Swallow, beneath ash-coloured, with a whitish rump. 



Hirundo unalashkensis. GmeL Si/st. Nat. 1. 1025. — VieiL Ois, 



de PAmer. Sept. 1. 64. 

 Hirundo aoonalaschkensis. Lath. Ind. Orn. 2. 577. 15. 

 Hirondelle d'Ounalashka. Vieil. Ois. de PAmer. Sept. 1.64. 

 Aoonalaschkan Swallow. Lath. Gen. Syn, 4. 571. 15. 



This, as its name implies, inhabits Aoonalaschka: 

 it is in length four inches and a half: its beak is 

 dusky: the prevailing colour of the plumage is 

 obscure black ; with the sides of the head, and 

 under parts of the body, dusky cinereous : rump 

 dirty white : tail slightly forked : legs dusky* 



