XXIV GEOGEAPHICAL DISTEIBUTION. 



is certain, e. g. the occurrence in both areas of Coracias abyssinica and other species ; 

 l)ut the exact limits between the Senegambian Province of the Sudanese Sub-Region and 

 the Forest or West-African Sub-E,egion have yet to be dehneated, and the Swallows do 

 . not help us much. The only work on the fauna of Senegambia is by M. de Eochebrune ; 

 but there are so many statemeiits in this work which are absolutely at variance with 

 the experience of other collectors in the province, that his conclusions have been 

 received with considerable hesitation. Nevertheless there are one or two Swallows of 

 which specimens have been received from Senegambia by European museums, which are 

 otherwise known as inhabitants of the West-African Sub-Region, such as Sirundo 

 leiicosoma : and therefore further information is necessary as to the exact distribution of 

 these otherwise purely West-Coast forms in Senegambia. 



Our knowledge of the Zoo-Geographical Sub-Re2;ions of Afi'ica is in its infancy, and 

 there is much to be done in the definition of the boundaries of the Abyssinian and East- 

 African Sub-Regions. In fact, if Psalidoprocne albiceps be found only at such elevations 

 as to warrant its inclusion in our Cameronian Sub-Region, East Africa will possess no 

 peculiar species of Swallow. 



The only sj)ecies which confirms our recognition of a Cape Province of the South- 

 African Sub-Region is Biblisfuligula ; but, on the other hand, the presence of four peculiar 

 species in South-westeru Africa, viz. Bihlis anderssoni, Ilirimdo angolensis, Hirimdo 

 nigi'oriifa, and Petrochelidon rufigula, maj'-, in conjunction with numbers of other 

 peculiar species of birds, enforce the recognition of another natural province of the 

 South- African Eauna. As, however, its component species have not yet been statistically 

 compared with those of Zambesia, we will not at present confer a name upon the western 

 province, as it is possible that it may be found to extend towards the east in an 

 unexpected degree. 



Our remarks on the zoo-geographical districts of Africa miist be compared with 

 those of Dr. Reichenow in the ' Jahrbuch der Hamburgischen wissenschaftlichen 

 Anstalten,' vol. x. pp. 3, J^. 



C. INDIAN REGION. 



C^. Indian PENiNsuiiAR Sub-PvEgiox. 



Peculiar Geuera : — 0. 



Peculiar Species : — 1. Bihlis concolor. 3. Hirundo erythropygia. 3. Petrochelidon fluvicola. 



Species Trliich are kuown to breed witLiu its limits : — 1. Chelidon urbica. 2. Cotile sinensis. 

 3. Biblis concolor. 4. Hirundo smithii. 5. H. erythropygia. G. Petrochelidon fluvicola. 



