14 MR. S. A. NEAVE ON BUTTERFLIES [Jan. 18, 



which is very brilliant on the wing, to have a very powerful flight 

 and to be somewhat less easy to catch than most Acrseinrc. It 

 frequents the neighbourhood of rather dense forest or thickets. 



ACR^EA PERENNA Dbl. & Hew. 



This species is represented in the collections by a single male 

 from the Lufupa river, x. 



ACR^A CEPHEUS L. 



A single female captured on the same day and in the same 

 place as the last species. 



ACR^A BtTTTNERI. 



Acrcea buttneri Rogenh. Ann. Hofmus. Wien, iv. p. 553, pi. 23. 

 fig. 8. 



Of this somewhat rare species I took five specimens at Kan- 

 sanshi, N.W. Rhodesia, i., and four more on the Lufupa and 

 Lubudi rivers, x. I did not observe it elsewhere. It is a wood- 

 land species somewhat resembling, on the wing, atolmis Westw., 

 especially the wet-season form of that species. 



ACR^A VIOL ARUM ASEMA Hew. 



Not uncommon in the Fort Jameson district and on the Broken 

 Hill plateau. It prefers open country and seems to avoid the 

 low-lying Luangwa valley. The above localities appear to be the 

 northern limit of its range, as farther north it is replaced by the 

 next subspecies. At ISTdola, N.W. Rhodesia, 21 &, 23.ix.05, I 

 captured one specimen of each form. 



ACRCEA VIOLARUM OMRORA. 



Acrcea omrora Trim. P. Z. S. 1894, p. 24 note. 



Acrcea asema Trim. P. Z. S. 1891, p. 68, pi. 8. figs. 9, 10, 10«._ 



Acrcea violarum umbrata "Wichgraf, B. E. Z. liii. p. 242, pi. vi. 

 figs. 5, 6 (1908). 



This is a fairly common species throughout the year on the 

 high plateau of ISLE. Rhodesia from the Serenji district north- 

 wards, and also occurs, but less commonly, in Katanga. The 

 specimens recently figured by Wichgraf under the name umbrata* 

 are wet-season specimens and much more heavily marked than 

 the dry-season ones. A long series taken at all seasons, however, 

 makes it highly improbable that they are distinct species. 



Acrcea mirifica. (Plate I. fig. 3, $ .) 



Acrcea mirifica Lathy, Trans. Ent. Soc. 1906, p. 2, pi. i. fig. 2. 



I found this highly remarkable species not uncommon but 

 extremely local on the higher plateau country from Serenji to 

 Lake Bangweolo. It seems to be entirely confined to patches of 

 marshy ground generally marking the sources of streams and well 

 described as " sponges " by Livingstone in his Last Journals. This 

 insect has a very weak flight, but is extremely tough and when 

 pinched between finger and thumb exudes a pale green fluid. 



* Loc. cit. 



