72 BIRDS. 



4. COTYLE, Boie. BANK SWALLOWS. 

 1. C. riparia, (L.) Boie. BANK SWALLOW. SAND 

 MARTIN. Dark gray, not iridescent, white below, a 

 brown shade across the breast; L. 4f ; W. 4; T. 2. N. 

 Am., abundant, breeding in holes in sandbanks, etc. 



5. STELGIDOPTERYX, Baird. ROUGH -WINGED 



SWALLOWS. 



1. S. serripennis, (Aud. ) Bd. ROUGH -WINGED 

 SWALLOW. Brownish gray; wing hooks weak in ?; L. 

 5J; W. 44; T. 2. U. S., not common, rare eastward, 

 breeding in banks, etc. 



6. PROGNE, Boie. MARTINS. 



1. P. subis, (L.) Bd. PURPLE MARTIN. Lustrous 

 blue -black throughout; $ duller, whitish and streaky 

 below; bill stout, almost hooked; L. 74; W. 6; T. o|. 

 N. Am., abundant. (P. purpurea, Auct.) 



FAMILY XXX. AMPELIDJE. 



(The Chatterers.) 



Primaries 10, or apparently 9, the first sometimes 

 rudimentary and displaced; bill stout, triangular, de- 

 pressed, decidedly notched and hooked, with the gape 

 very wide. Nostrils overhung by membrane covered 

 with bristly feathers. Tarsus short, with the lateral 

 plates more or less subdivided, and often scarcely oscine 

 in character; lateral toes nearly equal. As here con- 

 stituted, a small group of six or eight species, the 

 Myidestince usually brought into this connection being 

 really TurdidcB^ as shown by Prof. Baird. There are 

 two sub - families, bearing but little resemblance to each 

 other, PtilogonydinCB, of the warmer parts of N. 

 America, and Ampelince, of the northern parts of both 

 hemispheres. 



