464 Mr. W. R. Ogilvie-Grant U7i 



192. Hydroprogxe caspia. 



Hydroprogne caspia (Pall.) ; Saunders, Cat. B. Brit. Mus. 

 XXV. p. 32 (1896). 



Sterna caspia Pall. ; N. C. Roths. & Wollast. p. 30. 



[1 saw the Caspian Tern near Khartum and also up the 

 White Nile, but it was not observed south of Abba Island. — 

 R. M. H.] 



193. Hydrochelidon leucoptera. 



Hydrochelidon leucoptera (Schinz) ; Grant, Ibis, 1900, 

 p. 330 ; Witherby, p. 274. 



a. ? . Kaka, 28th April. No. 407. 



b. ? Goz-Abu-Gumar, 19th May. No. 514. 

 Specimen a of the White-winged Black Tern has partially 



attained the black summer plumage, wliile in h the change 

 is complete. Both have the iris hazel, the bill black, and 

 the legs dark red. 



194. ^Hydrochelidon nigra. 



Hydrochelidon nigra (Linn.) ; Saunders, Cat. B. Brit, 

 Mus. XXV. p. 17 (1896) ; Witherby, p. 274. 



[Both Hydrochelidon leucoptera and H. nigra were common 

 about Omdurman and as far south as Goz-Abu-Gumar. — 

 R. M. H.] 



195. Gelochelidon axglica. 



Gelochelidon anglica (Mont.); Grant &, Rcid, p. 694; 

 N. C. Roths. & Wollast. p. 30. 



Sterna a7iglica Mont. ; Witherby, p. 274. 



a. S ' Ed-Duem, 22nd May. No. 538. 



The Gull-billed Tern has the iris dark hazel, the bill 

 black, and the legs and feet brownish black. 



196. ■^Rhyncuops flavirostris. 



Rhynchops flavirostris Vieill. ; Saunders, Cat. B. Brit. 

 Mus. XXV. p. 158 (1896). 



[Scissor-billed Terns were not very common, and I never 

 noticed them north of Abba Island. — R. M. H.] 



197. *Larus fuscus. 



Larus fuscus Saunders, Cat. B. Brit. Mus. xxv. p. 250 

 (1896) ; Witherby, p. 274. 



