12 EINAR LONNBERG 



was seen to approach land during the day. This difference in the habits of 

 the Petrels on the two islands was no doubt due to the presence on Masafuera 

 of the ever watchful buzzards which enjoyed to hunt fardelas. I let loose se- 

 veral fardelas out of their burrows on Masafuera, and they were every one of 

 them caught by the buzzards before they had time to save themselves over 

 the sea. On Masatierra there were no buzzards, and this may explain why 

 some petrels now and then dared to fly over this island even at daytime.* 



»The Shearwater occurred in thousands. It nested also on Santa Clara. » 

 When H. SCHALOW (Fauna Chilensis 1897) wrote on the birds of Masa- 

 tierra, it was not known to him that this species really bred there. 



Priocella antarctica Stephen (= glacialoides Smith) 

 Santa Clara: i '^ ^^/s 1917. 



This petrel is, of course, only an accidental visitor. 



Pterodroma (Aestrelata) neglecta Schleg. 

 Masatierra: i J* ''/i, i c? 'Vu i ? 'Vi, 2 ^<^ ^^/i, i J* '% i <^ semipull. 



''A 1917- 



All these specimens represent the dark phase. The young bird collected 

 ^^/4 is the darkest of all, being quite as black as a crow all over except on 

 the throat, where it is mottled with white. It is quite interesting to find that 

 its measurements of the wing and the culmen are just as large as in the adult, 

 although it is so young that it still has a patch of down on the nape and 

 neck, and the lower breast and belly covered with fluffy down of a smoky 

 grey colour. 



The measurements of the specimens, in the same order as enumerated 

 above, are: 



The white shafts to the primaries is a good recognition mark for this 

 species when compared with Pi. melanopus. 



The length of the wing is somewhat greater than usually recorded for 

 this species, but LOOMIS has recently published just as large measurements for 

 birds from the Kermadec Islands. 



»This Fardela bred exclusively within a very limited part of the island, 

 viz. on the cliffs towards the sea below the Centinela. Most nests were inacces- 

 sible in consequence of the steepness of the rocks. The eggs were laid without 

 any real nest directly on the rock, or eventually on moss. The bird is fearless 



