to the Ornithology of Egypt, 453 



Hydrochelidon xigka. 

 Hydrochelidon fissipes Shelley, p. 300. 

 Oil 24th August ;Mr. Balboui shot an immature Black 

 Tern, which he forwarded to me. 



Hydrochelidon leucoptera. 



Hydrochelidon nigra Shelley, p. 301. 



A host of birds must have visited the Wadi Natron on 

 the 10th of May, 1910, for on that day Mr. Balboni shot and 

 sent to me no less than ten adult White-winged Black Terns 

 as well as five Reeves, one Marsh Sandpiper, four Little Stints, 

 one Bee-eater, two Spanish Sparrows, and two Golden 

 Orioles. 



Females of the present species differ from the males in 

 having less white on the shoulders and grey tails, and in being 

 less sooty black below; whereas adult males have pure white 

 rectrices and are jet-black on the under parts. 



Larus ridibundus Linn. 



Mr. Balboni sent me a Black-headed Gull which he shot 

 on December 23rd, 1910. 



I believe this s])ecies to be onlv a winter visitor to Egypt, 

 and not a resident as Capt. Shelley says it is. In November 

 1911 I saw a single example on one of the Salt Lakes near 

 Bir Hodmer. 



PODICEPS FLUVIATILIS. 



Podiceps minor Shelley, p. 314 ; Loat, Ibis, 1905, 

 p. 560. 



This little Grebe is probably a resident in the Wadi 

 Natron, where it breeds. I have three specimens collected 

 by Mr, Balboni : one, a female assuming breeding plumage, 

 shot on February I5th, 1911; one adult female in full 

 breeding plumage, shot on June 3rd, 1911 ; and an immature 

 male on June 5th, 1910. In November 1911 I saw a large 

 number on the lake at Gaar, 



1 (W 



