234 Mr. D. A. Baunerman on an Ornithological 



only piece together the evidence supplied by naturalists whose 

 combined observations stretch over the different months of 

 the year. In this way we can arrive at fairly correct conclu- 

 sions with regard to the more obvious migratory movements 

 which take place ; there is^ however, a great deal to be learnt 

 as to the extent to which migration occurs actually amongst 

 the islands ; the case of the Corn Bunting [Emheriza 

 culandra calandra) alone supplies source for considerable 

 investigation. 



It is said to be very unusual for birds to strike the 

 lanterns in the various lighthouses of the group, so that one 

 of the surest sources of gaining information is thereby closed 

 to us. We may infer, however, from the very large number 

 of indigenous forms inhabiting the Canary Islands, that 

 regular migration of Passerine birds is very limited. Von 

 Thanner records that the lighthouse keeper on Allegranza 

 told him that every strong wind coming from the neigh- 

 bouring coast of Africa, and quite independent of the time 

 of year and the season of migration, brings numerous small 

 and large birds. A thorough survey of the Ornis inhabiting 

 the African coast-line between Cape Ghir and Cape Bojador 

 is necessary before we can discuss with any confidence the 

 relation which it bears to that of the Canary Archipelago. 

 Unfortunately, this part of the African mainland is inhabited 

 by lawless nomad tribes, who have on many occasions shown 

 themselves to be extremely hostile to strangers. The Spanish 

 fishermen from the islands, whose trade takes them along 

 this coast, hold the tribesmen in the greatest dread, and 

 seldom land there unless absolutely compelled to do so. 



In the following list I have given the references to each 

 particular species as it was mentioned in the first part of 

 my account of the Expedition, which appeared in the 

 January number of ' The Ibis,' 1914, pp. 38-90. 



Reference to this paper is quoted in the following pages as 

 " Bannerman, Part I.'^ 



My special thanks are due to the authorities of the Tring 

 Museum for the unfailing courtesy with which they have 

 always met my request for the loan of specimens. I should 



