464 Mr. D. A. Bannerman on the Distribution of 



on any of his frequent journeys amongst the islands, althoujrh 

 he is erroneously quoted as having done so. On the other 

 hand, Bolle himself quotes Berthelot as saying that he liad 

 observed Thalassidi'oma hypoleuca constantly all around the 

 waters of the Canary Islands. There is no evidence of its 

 ever having bred in the Archipelago. 



Breeding range in the Cape Verde Islands. 



Breeds on one of the Rombos Islands and on Branca. 

 This species was found breeding in the Cape Verde Islands 

 by Boyd Alexander, and since his expedition in 1897 we 

 have received no further details concerning its distribution 

 in the islands. Alexander discovered it first on the small 

 island of Cima in the Rombos Group, wliere he landed on 

 the 15th of March, 1897. He found it breeding in con- 

 siderable numbers, the eggs being in an advanced stage of 

 incubation. Many birds and eggs were obtained which are 

 now in the British Museum Collection. Apparently the bird 

 does not resort to the largest island of the Rombos Group 

 to breed, as Alexander did not find a single bird on this 

 island. It is not found on the island of Brava. The skins 

 in the National Collection labelled '^Brava, Rombos Is., 

 March '97,^' were all collected on the Rombos Islands and 

 not on Brava, as can be seen by consulting the report of the 

 expedition ('Ibis,' 1898). Brava is not, strictly speaking, 

 a member of the Rombos Group. 



The next island upon which Alexander discovered this 

 Frigate-Petrel was Branca, situated a considerable distance 

 from the Rombos Islands, which he visited during the first 

 week in May. He discovered that all the birds had young 

 but did not obtain any eggs. The birds probably com- 

 menced breeding at the same time as those of the Rombos 

 Island colony. 



In Bocage^s paper on the birds of the Cape Verde Islands, 

 merely quotes Alexander. Salvadori does not mention the 

 species in his report of the Tea Collection^ while Fea himself 



