798 Messrs. Sclater and Mackworth-Praed on (Ibis, Otis (Eupodotis) arabs stieberi.

Otis arabs stieberi Neum. J. f. O. 1907, p. 307: Kusseri, Shari river.

[B. coll.] 1 Minawi Estate, EH] Damer, Ber. [C. & L. coll.] 1 Melut Jan.,1 Lake No Feb., 1 Bahr el Zeraf Feb. U.N.

This race, separated by Neumann on account of the colour of the crown, which is gold and black, and not grey and black, seems to extend from the Nile valley westwards. There is a specimen of this race in the Museum from 30 miles S.W. of Rabat, Morocco, ‘The El Damer bird is most certainly of this race, while the Gedaref bird belongs equally certainly to the other. Southern birds, while nearer to this race than to O. a. arabs, are as a rule darker on the crown than northern birds, as is exemplified by the specimen from the Bahr el Zeraf and by one or two others in the Museum collection. The range of O. a. arabs is from southern Arabia and the Red Sea Coast to Kritrea and Kassala.

The range of O. a. stiebert is from the Nile Valley to western Morocco and south to the Shari River.

Otis arabs is the commonest of the large Bustards of the Sudan. The specimen recorded by Ogilvie-Grant (Ibis, 1902, p. 453) as HKupodotis kori, which was collected by Hawker at Renk, proves on further examination to be an example of O. a. stiebert.

Otis (Neotis) cafra denhami.

Otis denhami Childr. in Denh. & Clapp. Trav. ii. 1826, p. 199: Interior of N. W. Africa; Reichw. V. A. i. p. 245: Butler, Ibis, 1908, p. 260.

Confined to the western side of the Sudan, Kordofan, and the western Bahr-el-Ghazal whence it ranges across to Lake Chad. ‘There are very few examples of this fine Bustard in collections. The largest specimen in the British Museum, one obtained by Petherick in Kordofan, has a wing of approximately 6830 mm. The large size of the bill is at once evident when compared with typical O. c. cafra, though in coloration they are not unlike,