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water -courses Vinago calva salvadorii, Oriolus larvatus rolleti 

 were the birds most frequently seen. Anthus rufuliis raalteni, 

 and Anthus leucophrys, Myrtnecocichla aethiops crt/ptoleuca and 

 Hiparia cincta cincta also occurred in large numbers. 



A very interesting find was also made here in the neigh- 

 bourhood of Elgon, for it was here I shot a specimen of Irrisor 

 erythrorhynclius niloticus, whose real range lies considerably more 

 north. The find should thus show that the bird-life of the 

 Elgon regions includes also elements from other zoogeographical 

 areas, and later on in the description of the Ornis of Elgon 1 

 shall show how, from other faunistic provinces, additions to the 

 typical bird-kingdom are present. Farus niger purpurascens, 

 Icarus albiventris, Crateropiis melanops sharpei, Hirundo sene- 

 yalensis and numerous other birds belonging to the Elgon- 

 fauna already began to appear two days' march from the 

 mountain. 



On the journey up to Elgon 214 birds were shot in all, 

 representing those mentioned above, as well as a number of 

 other species and forms. 



A short description of the Ornithology of the Eastern Slopes 

 of Mount Elgon and some Remarks on the Mountain and 



its Nature. 



Mount Elgon i^ one of the largest extinct volcanoes in the 

 world (according to Purvis, p. 266, the largest volcano in 

 the world) and probably formed in the later tertiary period. It 

 lies north of the eastern part of Lake Viktoiia, intersected by 

 1° N. lat. The western part with the main crater lies in Uganda, 

 while the eastern slopes belong to Kenya Colony. The boun- 

 dary is drawn across the highest summit, 4.636 metres (14.140 

 feet) (S t i g 1 e r writes in "Rasscnphysiolog. Studien in Uganda", 

 p. 221, that the highest point is 4.382 metres and states that 

 the crater is 1 1 kilometres in diameter) and then follows the 

 Swam River northwards. The diameter of the mountain is about 

 70 kilometres and the main crater about 12 kilometres across 

 (Lindblom: Ymer, 1921, p. 140). The rainfall on Elgon 

 varies very much. Johnston (The Uganda Protectorate, 

 vol. I, p. 301) says that "rain is abundant, and although it is 

 heavier in some months than in others there is scarcely a month 

 of the year which is without rain. The heaviest rains generally 

 occur in January, February, March and April, October and No- 

 vember. I should say that the average rainfall in this Forest 

 llegion was 60 inches". The western slopes of the mountain 

 have the heaviest rainfall. 



We pitched our camp at an altitude of about 6.800 feet, 

 on the outskirts of the forests and from this point excursions 



