the Butterflies of the White Nile. 55 



African species, and probably has a wider range up the 

 river than has been yet recorded. 



The other five are more Palaearctic in character, or are 

 borderland species. C eulimene, so far as is known, is 

 confined to the Anglo-Egyptian Sudan, and I know of only 

 one example of T. ephyia taken outside that country. 

 Synchlo'e glauconome has a M-ider range to the north, at 

 Shendi it gets -within sixty-five miles of Khartum, but does 

 not actually enter our district. 



In like manner there are three butterflies which just 

 attain the southern end of our district, viz. : — ■ 



23. Castalius usemia. 

 46. Teracolus vesta. 

 70. Papilio pylades. 



These are all Central or South African forms. 



Though well known to have a wider range outside our 

 limits, there are three species which, so far as actually 

 recorded have a very restricted range on the White Nile : — 



Teracolus halimede, 13° 22'-10° 40'. 



Teracolus j)^eione, confined to Kaka, Lat. 10° 40', ex- 

 cepting so far as the locality of Petherick"s specimens is 

 unknown. 



Teracolus phisadia, 13° 22'-10° 50', but presumably 

 Capt. Dunn's specimens came from something like 2° 

 further south. 



The most northerly limit of the great genus Acraea 

 would seem to be attained by A. acerata (f. vinidia) in 

 Lat. 12° 37' N. 



The sole species peculiar to the White Nile district 

 would appear to be the little-known, and hitherto rare, 

 Pinacopteryx venata.^ 



Any one dealing with the Butterflies of N.E.' Africa 

 must depend greatly on the magnificent work of Klug. 

 The writer has had the good fortune to take all his 

 Pierinae. 



* While this paper was going through the press my attention 

 was called by Commander J. J. Walker to the description bv 

 A. G. Butler [Ent. Mo. Mag., vol. ii, p. 169, 1866] and a good 

 wood-cut of Aphnaeus (?) marmoreus, n. sp. The type, a female, 

 was taken by Petherick on the White Nile, and would appear to 

 be unique ; it now stands in the National Collection next to the 

 S. African Stugeta bowkeri, Trimen. 



