SWALLOWS 



133 



The Bock-Martin (Ptyonoprogne faligula) is a brown bird 

 with the tail-feathers, excepting the centre and two outer 

 ones, adorned by a circular white spot on the inner web. 

 Length, 5| inches. 



Fig. 73. — Nest (top one) of White-throated Swallow. 



It is not found north of the Transvaal, nor in South-west 

 Africa, but is otherwise fairly evenly distributed. It 

 builds an open half-cup-like nest against a rock or under 

 the eaves of a house, of mud pellets, and lays three or 



