26 MR. S. A. NEAVE ON BUTTERFLIES [Jail. 18, 



females exhibit a marked tendency to melanism in the wet season. 

 Many females also have a more or less well marked subapical white 

 bar. 



ACRiEA NATALICA Boisd. 



A common species everywhere and at all seasons, more especially 

 in the Luangwa valley where it is quite the most dominant of all 

 the larger Acrseinse. Dry-season specimens, especially from the 

 mid-Zambezi and lower Luangwa, are often much smaller and 

 more brightly coloured. Both this species and A.anemosa Hew. are 

 closely mimicked by some remarkable moths of the genus Hibrildes. 

 Of these there was one, H. crawshayi Butl., which I took pretty 

 commonly in the Luangwa valley during the rains. This insect 

 has not only the markings of an Acrcea, especially on the underside, 

 but hangs on grasses etc. in identically the same attitude. 



ACR<EA RAHIRA Boisd. 



I took two specimens of this species on the Alala plateau, 

 ix. 1905, and subsequently found it common in swamps in the 

 valley of the Chambezi, iv. and v. It seems to be confined 

 to swamps and marshy ground, which accounts for its being very 

 local. Its flight is very feeble. The majority of my specimens are 

 markedly paler in colour than those from S. Africa. 



Acrcea serena Fabr. 



Ubiquitous and on the wing all the year. Especially abundant 

 in hot low-lying regions and particularly frequents the clearings 

 of old native gardens, etc. 



ACRCEA VENTURA Hew. 



A fairly common species in the open country of the high 

 plateau from Broken Hill to Tanganyika. Not taken in the 

 Luangwa valley or in Katanga. It is on the wing all the year. 



Acr;ea vinidia Hew. 



This little species is common everywhere and at all seasons, 

 especially in hot low-lying localities. 



Acr<ea sotikensis E. M. Sharpe. 



This species does not occur in the Luangwa valley or the 

 Broken Hill district, but is common west of the Mchinga escarp- 

 ment and in Katanga. It is a woodland and forest species with 

 rather a swift flight for its size. Some specimens, especially those 

 from Katanga, have the subapical bar orange-red like the ground- 

 colour, instead of yellow as in the type. 



Acr^sa bonasia Fabr. 



Not uncommon in the valleys of the Kalungwisi and Lofu 

 rivers in N.E. Rhodesia and in the Lualaba valley in Katanga. 

 It seems to be confined to dense forest. These specimens belong 

 to the type form rather than to cdicia E. M. Sharpe, the eastern 

 race of the species. 



