172 BULLETIN" 15 3, UNITED STATES NATIONAL MUSEUM 



senegallus^ but are nearer to the latter.^" The birds increase in size 

 from west to east, but the increase is not noted west of Darfur, east 

 of which come some birds with wings 235 millimeters lone:. 



S0u,iroff 



O too H OC a go 4^0 J'oo Mites 

 ' SCALE • 



Figure 2. — The disthibutiox of Afribyx senegallus in noktheastern Africa: 

 1. Afribyx senegallus sen'E(;allu.s ; 2. Afribyx senegallus major ; 3. Afribyx 

 senegallus lal'eralis 



The southern form, lateralis^ is easily distinguished by its dark 

 flank patches which extend across the abdomen, making a dark band 

 separating the grayish brown of the breast and upper abdomen from 

 the white of the lower abdomen. Birds from the northeastern edge 

 of the range (two specimens from western Uganda, and eastern 



«ee Lynes, Ibis, 1925, p. 568. 



