16 EINAR LONNBEKG 
Diomedea melanophrys Boie 
Native name: Pajaro carnero. 
Masatierra: 1 ¢ °/s 1917. »Iris yellow.» 
As this Albatross is known by a special name in Juan Fernandez, it 
must occur there pretty regularly, but it was not recorded by SCHALOW, 1897. 
Spheniscus magellanicus Forster 
Santa Clara: 1 ¢ 9/1 1917. 
Masatierra: 1 ¢ *1/1 1917. 
Both are immature birds without pectoral band. Former authors have 
recorded Sph. humboldi from this locality. To judge from the small dimen- 
sions and the white inside of the flippers I must, however, name these spe- 
cimens as above. 
Columba livia Briss. var. 
Masatierra: I 2 “Hate I d, I e Bests I J Sis ] Jb juv. Salis I 3 o/h, I 2 
CaM Val ete o/h eT ase ig LOI. 
As already pointed out by other authors who have written about the 
Ornis of these islands, these feral pigeons vary decidedly in a melanistic di- 
rection. Apparently the characteristic features of the breed are not yet firmly 
fixed. The present specimens have all of them a grey rump like C. zztermedia, 
and the two palest specimens (one young and one old!) resemble zztermedia 
very much, although they are darker The darkest has the whole back very 
dark slaty, almost black, and the others are intermediate, with the back and 
the wings more or less mottled with slaty blackish and with the black from 
the upper neck descending more or less far down on the back. One of the 
darkest specimens, an old male, has small subtriangular, apical white spots on 
the upper wing coverts, which is a very interesting feature, because widely distant 
species display a similar pattern. In one or two others something similar may 
be discerned, although not quite so plainly. 
The length of the wing varies between 214 and 226 mm. Iris is stated 
to be black by the collector. 
»It bred very commonly along the coast on the steep cliffs.» (K. B.). 
The fruits of Silybum marianum (introduced) constitute the chief food 
during the summer, and Mr. BACKSTROM found its crops filled with such. He 
attributes the absence of pigeons on Masafuera to the absence or scarcity of 
Silybum on that island. 
