32 Mr. H. Seebohm on the 



HiRUNDO RUSTICA. 



The Barn-Swallow is a common summer visitor to the Cau- 

 casus^ and is often seen on the mountain-steppes. 



HiRUNDO URBICA. 



The House-Martin is very common, building both on the 

 houses and in the cliffs. 



COTILE RUPESTRIS. 



The Rock-Martin breeds at some elevation on the moun- 

 tain-steppes and passes. 



COTILE RIPARIA. 



The Sand-Martin is common in suitable localities in the 

 Caucasus. 



Cypselus apus. 



The Swift is common in most of the towns and villages and 

 on the mountain-steppes. 



Cypselus melba. 



The White-bellied Swift is found in all the mountainous 

 regions of the Caucasus, but is rarely seen in the plains. 



Caprimulgus europ^us. 



The Common Nightjar is common throughout the Caucasus 

 up to 5000 feet elevation. 



CUCULUS CANORUS. 



The Cuckoo is common in the Caucasus, but disappears 

 about the middle of September. 



Iynx torquilla. 



The Wryneck is found in the Caucasus up to .5000 feet 

 elevation. 



Drycopus martius. 



The Great Black Woodpecker inhabits the plane, beech, 

 and pine forests of the Caucasus. 



Gecinus viridis. 



The Green Woodpecker is very common in the plains, 

 forests, and mountains of the Caucasus. The Green Wood- 

 pecker of the Caucasus has twice been described as a new 

 species, the first time in 1841 by Brandt (Bull. Sc. Acad. 



