560 Mr. D. A. Bannerman on the [Ibis, 



between the birds of these two groups. The Buzzard of 

 the Azores can no longer l)e allied with the Canarian 

 race, although I united them in an earlier Part of this 

 List, and I am sure that the Buzzard* of the Cape Verde 

 Archipelago is now distinguishable, but this form I kept 

 distinct when dealing with Buzzards in ray List (Part iii., 

 Ibis, 1919, p. 482). Guppy drew attention to the fact 

 that the plants in the woods of the Atlantic islands 

 shewed specific and varietal differentiation and that this 

 divergence corresponded with the specific and subspecific 

 diff'erentiation of the pigeons of the genus Cohcmba inhabit- 

 ing these islands. 



A much closer bond exists between the avifauna of 

 Madeira and of the Canaries. Here we find there are 

 eleven Resident birds which are found in both groups : the 

 Least Goldfinch, Canary, Madeiran Rock-Sparrow, Dusky 

 and Heineken's Blackcaps, Madeiran Spectacled Warbler, 

 Cal)rera's Blackbird, Madeiran Redbreast, Canarian Kestrel, 

 Woodcock, and Madeiran Quail. An additional link, which 

 is now severed, is to be found in a race of Berthelot's Pipit, 

 Anthus bertheloti inadeirensis, inhabiting Madeira and Porto 

 Santo, while the typical and only allied form inhabits the 

 Canaries. 



Undoubtedly the majority of the species which are 

 included in my list of the Birds of Passage of the Canaries 

 occur similarly in the islands of Madeira, Porto Santo, and 

 the Salvages. I have not closely compared Padre Schmitz's 

 List of the Migratory Birds of Madeira, but liave little 

 doubt that all occur there also and tiius form a link 

 between the Archipelagos. 



The Cape Verde Archipelago has very few connecting 

 links with the Canaries, the only Resident birds common 

 to both being the Spanish Sparrow, Madeiran Spectacled 



* Since the above was written Mr. Kirke Swanu has named the 

 Azores Buzzard Buteo h. rothschildi, the Madeiran Buzzard B. h. hartei-ti, 

 and the Cape Verde Islands Buzzard B. b. bannertJiani [Syn. List of 

 Accipitres, Part ii. 1919, pp. 43, 44]. 



