1 91 8.] the Bii'ds of the Anglo-Egyptian Sudan. 641 



ruppelli, but is duskier below and slightly larger. Wing 

 averages 131 against 127 mm. 



We cannot, even with the large series before us^ appreciate 

 the other two races, E. r. deckeni from southern Somali to Voi 

 and E. r.fischeri from the rest of East Africa. The coloration 

 seems to vary considerably with the time of year, and the 

 size is also not a reliable guide. For instance^ in the series 

 collected by Butler in the summer, nearly all the examples 

 are paler than those collected by Emin in March, and the 

 wing-measurements, which Zedlitz gives as 119-126 mm. for 

 the race, are actually 122, 125, 127, 127, 127, 127, 128, 129, 

 130. We therefore consider that E. r. ruppelli ranges from 

 Mongalla through British East Africa, and from Victoria 

 Nyanza to the mouth of the Tana river to the eastern half 

 of German East Africa. On higher ground — as, for instance, 

 near Kilimanjaro and Kenia — the birds have a tendency to 

 be slightly larger and darker. We liave not been able to 

 examine specimens from southern Somaliland itself, but 

 the Taua river birds seem indistinguishable from the Nile 

 race. 



Count Zedlitz gives reasons for fixing the type-locality 

 of E. ruppelli as " White Nile," rather than Shoa, which we 

 accept. 



Prionops concinnata. 



Priuuops conciuitata Sundev. ; Sclater in Shelley's B. A. 

 v. p. 483. 



[B. coll.] 1 Gallabat Apl. Kas. ; 5 Roseires Aug. Sept., 

 1 Disa Aug. Sen. ; 1 Katta Jan., 1 Khor Gitti Jan., 

 1 Moyen Apl., 1 nr. llumbek Jan. B.G. 

 [C. & L. coll.] 2 Kamisa Dec. Sen. 

 [Chr. coll.] 3 Yambio Mch., 4 Mt. Bagiuzi Mch. B.G. ; 



5 Yei Nov. L.E. 

 On the whole, we consider it best to keep this as a distinct 

 species, and not as a subspecies of P. cristata as has been 

 suggested by Neumann. We can find no dirt'erence between 

 the Roseires and Bahr el Ghazal examples. 



SIR. I. VOL, VI. 3 Z 



