10. MYRMECOCICHLA. 357 



bastard primary ]•! to 01) inch. Length of wing 4-0 to 3-7 inches, 

 tail 2-5 to 2-3, cnlaien 0-85 to 0-75, tarsus 1-4 to 1-3. 



The foiiaJe apparently ditfers from the male in being slighlly 

 paler in colour, and in not having any white on the wing-coverts. 

 It is not known that anj' change takes place tifti'r the autumn moidt. 

 Birds of the year appear to have the white on the inner webs of the 

 primaries slightly suffused with buff. It is siipjtosed that the white 

 on the wing-coverts of the male is not assumed until the second 

 year. Some collectors assert that in fully adult plumage both sexes 

 have white lesser wing-coverts. 



The Ant-eating Chat-Robin has been found in various parts of 

 South Africa, Damara Land, the Orange Free State, the east of Cape 

 Colony, Natal, and the Transvaal. It is not known to be migratory. 

 Its reported occurrence in Senegal and Nubia requires verification. 

 a. Ad. sk. South Afiica {E. L. Lmjard). R. B. Sharps, Esq. 

 h. Ad. St. South Africa. T. Campbell, Esq. [P.]. 



<■'. Ad. sk. Kingwilliamstown. Herbert Trevelvan, Esq. 



d. J ad. sk. Kingwilliamstown, May 24, Herbert Trevelvan, Esq. 



1877. [P.]. 



e. Ad. sk. Elands Post (T. C. Atmore). R. B. Shaqie, Esq. 



/. d" ad. .sk. Newcastle, May .30, 1874 {F. C. G. & W. Gates, 



Oatea). ' E.sqrs. [P.]. 



ff. 2 ad. sk. Potcliefstroom, Tran.svaal, Dec. Dr. Exton [P.]. 



26, ]87() (W. Lucas), 



h. J ad. sk. Potchefetroom, Jan. 18, 1877 Dr. Exton [P.]. 



( TF. Lucas), 



i. (S ad. sk. Potchefstroom, April 5, 1877. Dr. Exton [P.]. 



k. Ad. sk. Gndonga, Gvampo, Oct. 30, R. B. Sharps, Esq. 



18(30 (C. J. Andersson). 



3. Myrmecocichla poUux. 



Saxicola pollux, Hartlaub, P. Z. 8. 1865, p. 747 ; Gray, Haml-l. B. 

 i. p. 22o. no. 3230 (1869) ; Blanf. l<f Dress. P. Z. S. 1874, p. 235, 

 pi. xxxviii. fig. 1 ; Sharpe, ed. LayanVs B. S. Afr. p. 244 (1877). 



General colour of the upper parts slaf y brown, darker on the 

 longest upper tail-coverts ; lores and ear-coverts brown ; wings and 

 •wing-coverts brown, with obscure narrow paler margins ; two centre 

 tail-feathers entirely dark brown, the outer web of each succeeding 

 feather having more and more white at the base, until in the outer- 

 most tail-feathers on each side the whole outside web is white. 

 Underparts grey, shading into nearly white on the axillaries, under 

 wing-coverts, lower part of belly, and under tail-coverts ; inner 

 margin of quills pale brown. Bill, legs, feet, and claws black. 

 "Wings with the third, fourth, fifth, and sixth primaries nearly equal 

 and longest, seventh primary much shorter, second primary inter- 

 mediate in length between the sixth and seventh, and conspicuously 

 emarginated at the tip on the inner web, bastard primary 1-0 to 0-95 

 inch. Length of wing 4-2 to 4-U2 inches, tail 3-U to 2-bl, culmen 0-8 

 to 0"G5, tarsus 1 -3 to 1 -25. 



It is not known that the female differs in plumage from the male, 

 or that any change takes place after the autumn moult. Birds of 

 the year and younj in first idumaye ajjpear to be unknown. 



