notes on Butter files from the Victoria Nyanza. 219 



All the members of a small group of peculiar interest 

 were captured by Mr, Wiggins at Entebbe on the north- 

 west shore of the Lake within a few days of each other. 



The dull-coloured Plancma 'paracjea, Grose-Smith, 1 ^ 

 (April 5, 1903) and 1 % (April 9, 1903) is the model of 

 the group. It is mimicked by two species both recently 

 described,* viz. : — 



Psctulacr^ea ohsciora, 1 ^, 1 ^ (April 5, 1903), of which the 

 $ is the better mimic. 



Papilio gallierius i^eculiaris,^ 1 $ (April 6, 1903). 



This species is remarkable for its small size and sombre 

 colour relieved by pale cream-coloured markings, thus 

 closely resembling the model. 



Remarkable evidence of the coincidence of mimetic 

 forms in time and space is here afforded by the fact that 

 three such widely - separated species, all very closely 

 resembling one another, should all have been captured on 

 the same spot and on nearly the saiiie date. 



The plentiful Aerxa sotihensis, Sharpe (37), has only 

 one mimic in the collection but that a remarkable one, 

 viz. Mimaerxa poultoni, mihi (3). The resemblance on 

 both surfaces is extremely close. The group of spots on 

 the underside at the base of the hind wing and the 

 characteristically marked hind margin of the Acrxa is 

 faithfully represented on the Lyca^nid. 



A very large number of small orange-red and black 

 Acrmas, forming a synaposematic group occur in the 

 collection comprising : — 



Acrxa vinidia, Hew. (1287). 

 „ alicia, Sharpe (147). 

 „ uvui, Grose-Smith (5), 



And the more outlying A. screna, Fabr. (1451). 

 They are mimicked by the Lycoenid Telipna carnuta, 

 Hew. (2). . 



A similar group is that in which the common Pardoiisis 



* loe. cit. pp. 333 and 342. 



t N.B. — Dr. Karl Jordan, of the Tring Museum, informs me that 

 this species may not improbably prove to be a mimetic form of 

 the 5 of cynorta, Fabr., the (^ (J (not represented in tlie Wiggins 

 coll.) being hardly distinguishable from that species, 



TRANS. ENT. SOC. LOND. 1906. — PART II. (sEPT.) 15 



