gg HIRTTNDINID^. 



Key to the Genera. 



a. Toes feathered 1- Chelidon, p. 86. 



b. Toes bare. 



a'. Nostrils -with a superior membrane, the 

 nasal aperture longitudinal or oval. 

 a". With no indentation or fork on the 

 inner web of the outer tail-feathers. 

 a'". Nostrils lateral, with a distinct 

 lonfritudinal membrane overhang- 

 ing the nasal aperture. 

 «^ Hind toe small and weak, par- 

 ticularly the claw ; and not equal 



to outer toe and claw 2. Cotile, p. Jo. 



b\ Hind toe very stout and robust, 

 far exceeding outer toe and claw 



in size 3- Tachycineta, p. 112. 



b'". Nostrils oval and exposed, with 



very slight superior membrane . . 4. Phedina, p. i^a. 

 b". Outer feather indented on the inner 

 web, and generally elengated to a 

 great extent. 

 c'". Nostrdslateral.with distinct superior 



membrane .- • 5. Hirtjnbo, p. 123. 



d'". Nostrils open and exposed, with 



scarcely any superior membrane. . 6. Chebamceca, p. 1/1. 

 b'. Nostrils without any superior membrane, 

 rounded and exposed. 

 c". TaU strongly forked; upper surface 

 for the most part uniform, the rump 

 like the back. 

 e'". Outer toe connected with middle 

 toe as far as the basal joint ; cul- 



minal ridge flattened 7. Pbogne, p 1/2. 



f". Outer toe connected with themid- 

 dle as well as with its basal joint ; 

 culminal ridge rather elevated and 



onlv slightly rounded 8. AttiCORA, p. 18J. 



d". Tail square or oiilyslightlyemarginate; 



rump differing from the back in LP- ^^'^^ 



coloiu- 9- Petrochelidon, 



1. CHELIDON. Type. 



CheUdon, Bote, Ms, 1822, p. .5^0 C. urbica. _ 



Delichon, Moore, P. Z. 8. 1854, p. 104 C. nipalensis. 



Leg of CheNdon iirbica, to show feathered toes. 

 Ffivge. Confined to the Old World. Breeding in the northern 

 parts of Europe and Asia and wintering in India, the Burmese 

 countries, and extending to Borneo. In Africa it reaches to South- 

 eastern Africa and occasionally to West Africa. One species non- 

 migratory, but resident in the Eastern Himalayas. 



