260 



INSESSORES. 



FJSSIROSTRES. 



HIRUND1NID&. 



THE COMMON SWIFT. 



Cypselus opus. 



Hirundo apus, 



Swift Swallow, 

 The Swift, 



murarius, Common 

 apus, 



murarius, T/ie 



PENN. Brit. Zool. vol. i. p. 550. 

 MONTAGU, Ornith. Diet. 

 BEWICK, Brit. Birds, vol. i. p. 306. 

 FLEM. Brit. An. p. 61. 

 SELBY, Brit. Ornith. vol. i. p. 127. 

 JENYNS, Brit. Vert. p. 159. 

 GOULD, Birds of Europe, pt. ii. 



Martinet de Muraille, TEMM. Man. d'Ornith. vol. i p. 434. 



CYPSELUS. Generic Cliaracters. Beak very short, triangular at its base, 

 wide, concealed, depressed, gape extending beyond the eyes ; upper mandible, 

 hooked at the point. Nostrils longitudinal, near the ridge of the beak, open, 

 the edges raised and furnished with small feathers. Tarsi very short ; toes 

 four, all directed forwards and entirely divided ; claws short, strong, and curved. 

 Wings very long ; the first quill-feather a little shorter than the second. 



