Birds from British East Africa and Uganda, 33 



in general colour it aj^rees perfectly with two adults m. the 

 Jacksou collection from Lake Hanningtou. 



The male from the Turkwcl lliver is much richer iu 

 colour than the male from the Kozibiri River. 



Total length in flesh : c^ 11^ & llf inches ; ? 11 inches. 



Wing : cJ 189 & 172 mm. ; ? 182 mm. 



The Kozibiri male is smaller in the wing tlian the other 

 and is moulting, so that the paler colour is probably some- 

 Avhat due to fading. 



[<^. Irides brown, bare skin below eyes yellow, above 

 eyes green; bill yellowish brown (Kozibiri), reddish green 

 (Turkwel) ; feet yellow or dull yellow (Kozibiri). 



$, . Irides brown ; bare skin pale yeliow ; bill black ; 

 feet yellow. 



When the natives had finished watering their live-stock, 

 enormous flocks of this Sand-Grouse came to drink after 

 dark in the wells iu the river-bed. It was most interesting 

 to watcii this steady stream of birds entering and leaving 

 these deep holes, and that there were no collisions was 

 marvellous.] 



In naming these birds I have had to examine all the 

 available specimens of P. lichtensteinii, and have come to the 

 following conclusions regarding the distribution and races : — 



PtEROCLES LICHTEXSTEINII LICHTKNSTEINII Temn). PI. Col, 



T. 1825, pis. 355, 3C)1 : Nubia. 



P. /. hijperythrus Erl. (J. f. 0. 1905, p. 94-, pi. iv. : Dana. 

 Eiver, S. Somaliland) is a synonym. 



Range. Coast of lied Sea, Eritrea, Abyssinia, Somaliland. 



Females rather richer sandy. 



Wing : cJ (9 measured) 175-186 mm. ; ? (6 measured), 

 169-186 mm. 



Pterocles lichtensteinii arabicus Neum Orn.^lonatsb^. 

 1909, p. 152 : Lahadj, South Arabia. 



Both sexes considerably paler (more stone-colour and 

 markings above somewhat less broad) than in true P. I. 

 lichtensteinii. 



Range. Arabia, ]Muscat. and India uesL of the Indus-. 



SER. X. — AOL. III. . 1) 



