166 U.S. NATIONAL MUSEUM BULLETIN 22 3 



Crass, R. S. 



1944. The birds of Sulenkama, Qumbu District, Cape Province. Ostrich, 

 vol. 15, pp. 10-20. 



Crombie, a. C. 



1947. Interspecific competition. Journ. Animal Ecol., vol. 16, pp. 44-73. 



Crook, John Hurrell 



1958. Etudes sur le comportement social de Bubalornis a. albirostris. 



Alauda, vol. 26, pp. 161-195. 



BE Klerk, W. de K. 



1942. Notes on nests of birds in Adelaide, C. P. Ostrich, vol. 13, pp. 57-63, 



Delacoub, Jean 



1943. A revision of the subfamily Estrildinae of the family Ploceidae. 



Zoologica (New York City), vol. 28, pp. 69-86. 

 1951. Review of Bannerman's "The birds of tropical West Africa." Auk, 

 vol. 68, pp. 123-125. 



Delacotjr, Jean, and Edmund-Blanc, F. 



1934. Monographie des veuves (Revision des genres Ewplectes et Vidua) : 

 II Les veuves-combassous. Oiseau Rev. Francaise Ornith., n.s., 

 vol. 4, no. 1, pp. 52-110. 



Disnet, H. J. de S., and Marshall, A. J. 



1956. A contribution to the breeding biology of the weaver finch {Quelea 

 quelea) in East Africa. Proc. Zool. Soc. London, vol. 127, pp. 379- 

 387. 



Distant, W. L. 



1892. A naturalist in the Transvaal, xvi+277 pp., 6 pis. 



DOBZHANSKT, ThEODOSIUS 



1951. Genetics and the origin of species, ed. 3, New York, Columbia Uni- 

 versity Press, 364 pp. 



Dubois, Alphonse 



1886. Liste des oiseaux recueillis par le capitaine Em. Storms dans la 



region du lac Tanganyka (1882-1884). Bull. Mus. Hist. Nat. 



Belgique, vol. 4, pp. 147-150. 

 1905. Remarques sur I'ornithologie de I'^tat ind^pendant du Congo suivies 



d'une liste des espfeces recueiUies jusqu'ici dans cet 6tat. Ann. 



Mus. Congo Beige., zool. ser. 4, vol. 1, pp. 1-36, 12 pis. 



Emin Pascha (Edguard Schnitzer) 



1894. Bruchstiicke aus Emin Paschas letztem Tagebuch. Journ. Ornith., 

 vol. 42, pp. 162-171. 



Emlen, John T., Jr. 



1956. Display and mate selection in the widow-bishop birds. Anat. Record, 



vol. 125, p. 605. 



1957. Display and mate selection in the whydahs and bishop birds. Ostrich, 



vol. 28, pp. 202-213. 



Erlanger, Carlo von 



1907. Beitrage zur Vogelfauna Nordostafrikas, V. Journ. Ornith., vol. 55, 

 No. 1, pp. 1-58. 



EVERITT, C. 



1959. The purple whydah. Avicultural Mag., vol. 65, p. 96. 



