PTTONOPEOGNE. 



233 



Genus PTYONOPEOGNE, Reklunh. 



The eggs of the llock-Martins are all of the same type and hardly 

 separable from one another. They are of a somewhat lengthened 

 oval shape, and exhibit a moderate amount of gloss. The ground- 

 colour is white, speckled and spotted, and at times blotched, with 

 brownish red or chestnut and underlying grey or lavender. The 

 markings are almost invariably dense and more or less confluent at 

 the broad end, where they form au irregular zone or imperfect cap. 



Ptyonoprogne rupestris (Scop.). 



Cotile rupestris, Baedeker, Eier Eur. Vog. tab. 52. fig. IC (1855-63) ; 



Dresser, Birds Eur. iii. p. 513 (1874) ; Sharpe, Cat. Birds B. 31. x. 



p. 100 (1885) ; id. >.y Wi/att, Mon. Hirundinida;, i. p. 96 (1885-94;. 

 Hiruiido rupestris, Bree, Birds JSiir. 2ud ed. iv. p. 96, pi. — (1875). 

 Biblis rupestris, Sharjie i^- Wyatt, op. cit. p. 129. 

 Ptyonoprogne rupestris, Sharpe, Kand-l. iii. p. 190 (1901). 



The eggs of the Rock-Martin measure from -69 to "83 in length, 

 and from -02 to "57 in breadth. 



Ptyonoprogne obsoleta (Cuh.). 



(Plate YII. fig. 2.) 



Cotile obsoleta, Dresser, Birds Eur. iii. p. 521 (1875) ; Sharps, Cat. Birds 

 B. M. X. p. Ill (1885) ; id. ^- Wyatt, Mon. HirundinidcB, i. p. HI 

 (1885-94). 



