73 Mv. E. C. 'Wyhv— E;yi/j)t Revisited. 



159. Larus fuscescens, Lichteustein. 



I have seen this Gull flying about the harbour of Alexandria, 

 It is apparently intermediate between Larus fuscus, and Lm-us 

 argeiitatus, as it resembles the former in having the legs and 

 feet yellow, while the grey of the mantle is not much darker 

 than in L. argentatus. It is the common Gull of the Bos- 

 ])horus. There is a Gull of this species now alive in the Gardens 

 of the London Zoological Society ; until lately it was named 

 Larus michahellesi ; the label is now altered correctly. 



160. Larus audouini, Payraudeau. Audouin's Gull. 



To the best of my belief, I saw this Gull during my first 

 voyage up the Nile. 



161. Gelastes tenuirostris (Temminck). Slender-billed 

 Gull. 



A specimen of this Gull was shot by one of our party out of 

 a small flock, near Keneh in Upper Egypt. This species differs 

 fi'om the other small Gulls with red bills and legs in never, at 

 any time of the year, assuming a black head. It is not well- 

 named Slender-hilled Gidl, as its bill is certainly stouter and 

 stronger than that of the common L. ridibundus. It is figured 

 by Bonaparte (Icon. Faun. Ital.), also by Dr. Bree (B. Eur. iv. 

 p. 98). 



162. Chroicocephalus ridibundus (L.). Black-headed 

 Gull. 



The most common species of Gull on the Nile in March. 



163. Chroicocephalus melanocephalus, Natterer. Nat- 

 terer's Gull. 



I saw this Gull flying about the harbour of Alexandria in 

 April. It is easily distinguished, even on the wing, from C. 

 ridibundus, by its deep black head and its pure white wings 

 un tipped with black. 



16]'. Sterna caspia, Pallas. Caspian Tern. 

 I saw several of these fine Terns flying over a lake near Da- 

 mietta. 



165. Sterna velox, Riippell. Swift Tern. 



I bought some Tern^s eggs at Damietta, that had been taken 



