177 
PASSENGER TURTLE. 
Ectopistes migratoria. — Swainson. 
PLATE XIX. 
Columba migratoria, Auct . — Passenger Pigeon, Wils.Amer, 
Ornith. pi. 44, tig. 1. — Aud. Ornilh. Biog. p. 319, pi. 62. 
Among the few groups of the Cohimbidse already 
characterized, is that of Ectopistes, a genus astitut- 
ed by Mr Swainson, for the reception of the Colum- 
ba migratoria and Columba Carolmensis of authors, 
birds whicb, though nearly allied in other characters, 
are distinguished from the rest of the turtles by the 
greater length of their wings and tail, those essential 
organs of motion, the extra development of which 
necessarily indicates an economy and mode of life 
different from that of those species where these 
members are comparatively short, and differently 
proportioned. The subject of our present Plate is a 
native of the North American Continent, where it 
occupies a very extensive range between the twen- 
tieth and sixtieth degrees of N. latitude, and is not 
less remarkable for living at all times, even includ- 
ing the period of incubation, associated in flocks of 
countless myriads, than for its migrations, which, 
VOL. IX. M 
