4 ARKIV FÖR ZOOLOGI. BAND 11. NIO 5. 



and less yellowish than the corresponding parts of Z. jack- 

 soni. The yellow frontal band is similar to Datjthenay's 

 »golden yellow)i> (1. c. 26, 2), thus strikingly different from 

 the frontal band of Z. jacksoni which is &Primrose yellow» 

 (1. c. 19, 3). In the new form the frontal band is less broad, 

 but more sharply defined behind than in Z. jacksoni, in 

 which latter it shades more gradually into the »dull yellow- 

 green» (1. c. 292) of the crown. The chin is golden yellow, 

 the fore-neck, belly and under tail-coverts »Primrose yellow» 

 (19, 4). The yellow-green of the flanks almost meets across 

 the breast. Under wing-coverts light yellow. Bill larger 

 than in Z. jacksoni, culmen measuring 11,7 mm. Wing 65 

 mm., while the same measurement of Z. jacksoni varies between 

 08 and 62 (in the present specimens from Elgon resp. 59 and 

 61 mm.). 



Apalis porpliyrolaema Rchw. Neum. — Two specimens 

 from Elgon procured at an altitude of 11,000 feet the same 

 day, viz. Vs 1914. One of these agrees fully with the de- 

 scription with the exception that it perhaps is darker (iron 

 grey) on the back, so that there is not such a great difference 

 between the colour of the back and that of the tail as 

 Reichenow's coloured figure (Vögel Afrikas, Pl. 21) appears 

 to indicate. I do not think, however, that this difference is 

 of any importance. The other specimen is more aberrant. 

 Its grey upper parts have a slight olivaceoiis tint, and the 

 under parts are in a similar way somewhat tinged with yel- 

 lowish. The throat has only a few »brownish terracotta»- 

 coloured (Dauthenay, 322, 1) feathers on one side, but is 

 otherwise entirely whitish with a slight yellowish tint. Ac- 

 cording to Jackson (The Ibis, 1901) both sexes of this species 

 are similar. The differences pointed out above are thus no 

 doubt to regard as characteristics of the juvenile plumage 

 not yet described. This is further proved by the appearance 

 of the feet and the somewhat paler bill which indicate a 

 young bird. 



Pratincola torquata salax Verr. — Two male specimens 

 both collected on Elgon at an altitude of 11,000 feet resp. 

 -7* and Vs 1914. These two specimens are of interest, be- 

 cause they illustrate the variability of this Stonechat. The 



