47 
South-American Song-Spar rotes. 
one or two specimens of either of them, whereas the former 
is one of the very commonest species in collections. 
The two southern Song-Sparrows Zonotrichia canicapilla 
and Z. strigiceps were both discovered by Mr. Darwin 
during his celebrated “Naturalist's Voyage/' and described 
by Mr. Gould in the third volume of the f Zoology of the 
Voyage of the f Beagle'.' I will say a few words about what 
we know of each of these birds. 
Z . canicapilla is generally of the size and form of Z.pileata , 
though the legs and feet, judging from the examples now 
before me, are more slender. The under surface closely re¬ 
sembles that of Z. pile at a; and there is the same bright rufous 
patch on each side of the neck. The upper surfaces of these 
two birds are also much alike, except as regards the head. 
This in Z. canicapilla is of a uniform grey, with narrow white 
superciliaries, and, as will be seen from the figure (PI. I. fig. 1), 
shows no signs whatever of the two broad black lines on the 
sides of the crown which distinguish Z. pileata. Mr. Darwin 
obtained his specimens of Z . canicapilla at Port Desire, in 
Southern Patagonia, and on Tierra del Fuego, and found it 
nesting at the former locality. Mr. Durnford, as recorded 
above (p. 33), found it to be the “ common Sparrow " of Chu- 
put, which is a rather more northern locality than Port Desire. 
Dr. Cunningham obtained it at Ancud, in the Island of Chiloe, 
and at Sandy Point, in Southern Patagonia; but in our list of 
his collection (Ibis, 1870, p. 499) we did not recognize his 
skins as distinct from Z. pileata. I remark that in Gray's 
f Hand-list' (ii. p. 94) Z. canicapilla is referred to Fringilla 
australis , Lath .; but in my opinion Latham's description is too 
vague to enable any certain conclusion to be drawn from it. 
Z. strigiceps , as will be seen by the figure (PL I. fig. 2), is 
much more distinct from Z. pileata in plumage, and has 
shorter wings and more feeble feet, though not essentially 
different in form. It may at once be known from both the 
allied South-American species by the absence of the chestnut 
patches on the sides of the neck and of the lateral black marks 
on the throat. The feathers on the crown of the head are 
dark red, passing into cinereous on the nape, each feather 
