the Sobat and Baro Rivers. 609 
109. Hatraiirus vocirer (Daud.); Reich. 1. p. 605 
(1901); Grant, p. 443; Butler, p. 366; Neumann, 1904, 
p. 368. 
a,b. 8 2. Sobat, February 3rd. 
110. Fatco BarBaRus. 
Falco barbarus (Linn.) ; Sharpe, Cat. Birds B. M.1. p. 386 
(1874) ; Reich. i. p. 627 (1901) ; Butler, p. 362. 
a. 2? imm. Khartum, January 3rd. 
The specimen has the upper parts moulting into the slate- 
coloured plumage of the adult. 
111. CERCHNEIS TINNUNCULUS. 
Cerchneis tinnunculus (Linn.) ; Reich. i. p. 641 (1901) 5 
Grant, p. 444; Neumann, 1904, p. 372. 
Tinnunculus alaudarius (Gmel.) ; Butler, p. 365. 
a-d. Khartum, January 6th to 8th. 
112. DENDROCYCNA VIDUATA. 
Dendrocycna viduata Linn.; Grant, p. 445; Butler, 
p- 383. 
Dendrocygna viduata Reich. i. p. 124 (1900) ; Neumann, 
1904, p. 328. 
& 9. Kawa, January 28th. 
118. Darina acuta. 
Anas acuta Linn.; Reich. i. p. 117 (1900). 
Dajila acuta Grant, p. 445; Butler, p. 384. 
a,b. 9. Khartum, December 31st. 
114. Isis mrHiorrca. 
Ibis ethiopica (Lath.); Reich. i. p. 321 (1901) ; Grant, 
p- 449; Butler, p. 371; Neumann, 1904, p. 327. 
a. 2 imm. Sobat, February 3rd. 
115. Scopus UMBRETTA. 
Scopus umbretta (Gmel.) ; Reich. i. p. 353 (1901) ; Grant, 
p. 446; Neumann, 1904, p. 339; Butler, p. 377. 
a,b. g. Polkom, March 24tn & 25th. 
c. 9. Elea, March 26th. 
