— 251 - 



have hardly any black in the dark-brown plumage, while those 

 from Elgon have the head blackish brown, the rest of the body 

 dark-brown. 



The young birds from Elgon are entirely black (not blackish 

 brown) and only the upper wing-coverts are edged with brown. 

 The feathers of the throat lack the pale brown tips, found in the 

 old birds. 



In the original description of this form (Ibis, 1891, p. 445) 

 the tarsus is given as 1.3 ins (= 33 mm.); Reichenow (op. 

 cit.) on the other hand, gives 34— 3&mm. Of all the specimens 

 before me only 3 of them have 36 mm., one has 36 mm., all 

 the others have 37 mm. 



Wing, tarsus, 



115, 115 mm. 36, 37 mm. cTcf ad. Kiambu. 



112, 118 mm. 36, 37 mm. cTcT ad. Eldoret. 



117, 118 mm. 37, 37 mm. cTcT ad. Elgon. 



109 mm. 35 mm. 9 "'!• Kiambu. 



110 mm. 36 mm. 9 ^'^- Eldoret. 

 112 mm. 37 mm. 9 ad. Elgon. 



Ill, 113 mm. 37, 37 mm. cTcT juv. Elgon, Eldoret. 



Irides dark-brown; bill and legs black. 



When I compared my specimens with true aethiops in the 

 Berlin Museum, it appeared that my cryptoltuca were, as a rule, 

 considerably darker and thus any difference in this respect 

 between these two races cannot be made the cause for a sepa- 

 ration of the West African from the East African. Prof, 0. N e u - 

 m a n n , who has examined a great number of both races, kindly 

 placed his notes at my disposal and from his investigations it 

 appears that "the black and white of the wings is more sharply 

 defined in the Senegal bird {aethiops) than in the eastern bird 

 (cryptoleuca). The bill is always longer and slenderer in the 

 eastern bird, shorter and stouter in the Senegal bird", which 

 agrees perfectly with all my specimens. 



Finarochroa sordida rudolphi Mad. — Orn. Monatsber., 

 1912, p. 175. 



6 (5(5 ad. 28. 6.-30. 6.; 3 CQ ad. 28. 6.-30. 6.; 2 $6 juv. 28. 6.-29. 6.; 

 4 2Q juv. 28.6.-30. 6.; Mount Elgon. 



This form, described from Elgon, is a pure bird of the 

 mountains which first begins to appear north of the E'nca-forest. 

 Here large, desolate grass areas extend upwards, where solitary 

 Composi^ae-plants in the form of shrub and several other plants 

 constitute the principal vegetation. Here and there small streams 

 flow along and on their banks the vegetation is richer. Every- 

 where there lay larger or smaller accumulations of rocks and 

 stones and it is mainly in the vicinity of these that this bird is 



