752 Letters, Extracts, and Notes. [Ibis, 1922. 



Systema Avium. 



The fii'st half of the volume of the ' Systema Avium ' 

 dealing with the Ethiopian Region, and compiled by iNIr. W. 

 L. Sclater, is now completed, and is being passed for printing 

 by the Special Committees of the B. O. U. and A. O. U. 

 Before, however, actually going to press, the Committee of 

 the B. O. U. wish to ascertain what number of members of 

 the Union and others are likely to subscribe for it, as the 

 price must depend to a great extent on the number of copies 

 sold. The cost of printing the volume will be considerable, 

 and the Committee are afraid that, unless they are well sup- 

 ])orted by tlie members, they will not be able to finance tlie 

 Avork. A blank form of subscription will be found in the 

 present number of ^ The Ibis'; this form members and others 

 are invited to fill up and return to the Hon. Secretary. 

 It is impossible at present to fix the exact price of the 

 complete volume dealing with the Ethiopian Region, but 

 the Committee believe that it should not exceed £2 2s. Od. 

 Tliey hope they may be able to fix the price at considerably 

 less. 



Another Ringed Swallow in S. Africa. 



Mr. Witherby records (Brit. Birds, xvi. 1922, p. 81) the 

 recovery of another ringed Swallow in southern Africa, 

 making six in all. This individual was ringed as a 

 nestling in Berkshire on 20 August, 1921, by Mr. A. Mayall, 

 and recovered on 8 January, 1922, by Mr. E. Greeff, near 

 Jensenville, in eastern Cape Province. It is a remarkable 

 fact that all the Swallows hitherto recovered in South Africa 

 ai'C from the eastern half of the continent, and it will be 

 interesting to discover the line of migration, whether by the 

 east coast or the west coast or along the Nile vallev. 



