Birds of Sou/hern Cameroon. 



613 



have been meastircd. lliey vary in length from 16*5 to 

 18"5 ram., and in width only from 12*5 to 13'5 mm. Those 

 of one clutch are nearly always of the same width^ though 

 they vary in length. As these eggs vary greatly in colouring, 

 it may be worth while to say that they are all identified as 

 those of Cist'icola erythrops, the sitting bird having been 

 carefully compared in every case with my specimens. I was 



Text-fio-. 18. 



Tongues of CisticoUt erythrops^ see p. 612. 

 A, of nestling. B, of adult bird. 



the more particular to do this because^ as I thought, there 

 was more than one species of Cist'icola ; there were two at 

 Efulen, but only one has been found at Bitye. 



[In addition to the eggs which have already been described 

 ('Ibis/ 1909, p. 68) we find examples with the ground pale 

 greenish-white very finely mottled, and others with the 

 ground creamj^-white blotched and spotted with light red 

 and lilac— W.^R. O.-G.] 



Calamocichla RUFESCENS. [Oto'o-bisoug.] (Plate XII. 

 fig. 16, egg.) (Text-fig. 19, A, p. 614.) 



Neumann, Novit. Zool. xv. 1908, p. 214, ff". 



Calamocichla poensis Sharpe, Ibis, 1908, p. 318; Bates, 

 Ibis, 1909, p. 69. 



Three nests of Otu'o-bisoug liavc been found and brought 



SER. IX, — VOL. v. 2 T 



