488 Recent Literature. I July 



The Ibis. (11th Series), II, No 2. April, 1920. 



List of the Birds of the Canary Islands, with detailed reference to the 

 Migratory Species and the Accidental Visitors. Part VI. Appendix A- 

 Appendix B. By D. A. Bannerman. 



A Contribution to the Ornithology of the Island of Texel. By C. B. 

 Ticehurst. 



A List of the Birds collected in northern Saskatchewan and northern 

 Manitoba by Captain Buchanan in 1914. By J. H. Fleming [published 

 also in 'The Canadian Field Naturalist' for December, 1919]. 



Notes on South African Accipitres. By C. G. Finch-Davis. — -Treats 

 of habits and distribution. 



A Review of the African Dicruridae in the British Museum. By D. A. 

 Bannerman. 



A Nominal List of the Birds at present known to inhabit Siam. By 

 Count N. Gyldenstolpe. 



On the Type Specimen of Chloephaga inornata King in the British Mu- 

 seum, and some further Notes. By F. E. Blaauw. — The type specimen is 

 really a young magellanica so that inornata King becomes a synonym of 

 that species while the Black-banded Goose reverts to the name C. dispar. 



On a New Species of Bower-bird. By T. Carter and G. M. Mathews. 

 Chlamydera maculata nova Mathews. Under certain contingencies not 

 clearly explained, Mr. Mathews suggests that the form be renamed C. 

 maculata carteri (p. 499). 



Bulletin of the British Ornithologists' Club. No. CCXLVIII. 

 March 4, 1920. 



Largely devoted to an address by E. C. Stuart Baker on 'The Value of 

 Subspecies to the Field Naturalist.' Dr. Hartert, in commenting upon the 

 address, stated that he objected to making supposed intergradation be- 

 tween two forms a criterion of the subspecies and cited the case of island 

 races which were formerly regarded by American ornithologists as full 

 species because of the impossibility of intergradation but which now they 

 regard as subspecies. This action as we understand it has not been a 

 change of opinion but rather the recognition of another kind of intergra- 

 dation, i. e., the overlapping of characters. While we do not think that 

 the actual existence of intergrades should be required to establish a form 

 as a subspecies, we nevertheless cannot admit subspecific relationship 

 between forms separated by great distances and by other species of the 

 genus, as for instance Dr. Hartert's listing of the Carolina Chickadee 

 (Penthestes carolinensis) as a subspecies of an old world species. 



The following new forms were described: 



By Dr. Van Someren: from East Africa and Uganda : Cercomela turkana 

 (p. 91) Turkana country, west of Lake Rudolf; Eremomela badiceps turneri 

 (p. 92) Yala River; E. elegans elganensis (p. 92) S. Elgon; Sylvietla isabellina 

 macrorhyncha (p. 92) Tsavo; Dryodromus rufifrons turkanae (p. 93) Meu- 

 ressi; Prinia mistacea immutabilis (p. 93) Nakuru Lake; Hedydipna platura 



