4 



as C rupestris. I have often met Avith it about hills, but, I think, more frequently still 

 in the nei«'hbourhoo(l of the broad stream-beds, usually dry, which intersect the desert 

 plains of Baluchistan, but wliich, from containing more vegetation than the surrounding 

 country, afford a larger quantity of insect food to Swallows and Martins. C. obsoleto 

 was very common in December and January along the sea-shoi-e. I did not see much 

 of it in its l)reeding-haunts, though tlie birds at Kalagan and -Talk in March were in pairs, 

 hunting about particular spots, as if Imilding nests, and the males which I dissected .had 

 enlarged testes. They doubtless breed on rocks like their allies." 



The specimen described is an Egyptian one in the Britisli Museum. The bird 

 figured is also from Egypt, and is in Captain Shelley's collection. 



