752 BIRDS OF SOUTH AFRICA. 
marshes and swamps. As these temporary resorts dry up, the 
Ducks of this species move eastward, until they arrive at that 
extensive flooded country which stretches far and wide on each 
side of the Teoughe below Libebé. I have never seen this Duck in 
Damara or Great Namaqua Land.” Senor Anchieta has obtained 
the species on the Coroca River, on the coast of Mossamedes, and 
also in the interior at Quillengues and Humbe. At Quillengues it 
is called Imbanteque. 
Above, brown ; the feathers broadly margined with dirty fulvous; 
wings and rump blackish-brown ; in the centre of the back a rufous 
patch ; centre of under parts immaculate black-brown; flanks and 
sides transversely barred with fulvous ; fore part of the head, chin, 
and spot on the middle of the throat, white, more or less tinged 
with fulvous ; back of head and neck black ; front of neck and chest, 
deep ruddy. Length, 17”; wing, 84"; tail, 3”. 
Fig. Daubent. Pl. Enl. 808. 
725. Sarcrpiornis arricana, Lyton. Knob-billed Duck. 
This Duck may be at once recognized in the breeding season by 
the curious flattened knob on the bill. We have received it from 
Mr. Arnot and Mr. Chapman, who tells us it is common on the 
rivers of the north. It has also been killed on the Kleinmont 
River (January, 1868). Mr. Barratt obtained a specimen in the 
Transvaal near Potchefstroom, and Mr. Ayres also procured an 
example at a lagoon on Loup-spruit, about six miles from Potchef- 
stroom. He says: “ It is the only one I have ever met with; and I 
had great trouble to get it, as, after being shot, it flew into the 
spruit, dived, and died on the opposite bank.” In 1880 he writes: 
*‘The specimen sent is the only one of the kind that I saw amongst 
the Magaliesbergen ; it came down to a shallow pool one morning as 
my brother and I were at breakfast ; and he made a successful stalk 
and floored it.” The late Mr. Frank Oates shot an example in a 
tree at Mopani Pan, near the Ramaqueban River, in March, 1874. 
He adds: “The dogs caught a young one in the pan, where I 
suppose this Goose had its brood.” Mr. Jameson’s expedition met 
with it on the Molopo River in January; and Mr. Ayres observes 
concerning it: “ Rather sparingly distributed over this part of the 
country. I saw several in February flying over the Hart River.” 
Sir John Kirk states that in the Zambesi region it was “ found only 
