Explanation of Plates. 561 



last, because of the pale tawny ground-colour of the 

 under-side. 

 Fig. G. Ahantis tettensls, under-side. The under-side of the hind- 

 wings shows strong mimicry of an Acrasoid type. 

 7. Kedcstes macomn, var., under-side. The under-side generally 

 shows the incipient mimicry of an Acrajoid type. 



Explanation of Plate XV. 



British East African Bdtterflies Mimicking L. chrysippus. 



Acrrcine and Lyc;enid mimics of Limnas chrysippns form Jditgu in 

 British East Africa. Varieties of Acrxa encedon chiefly transitional 

 towards the form daira. 



All the figures are about fV of the natural size. 



Fig. 1. Llmaas chrysip2ms,{oTmklngii 1^ , 'Ma.y 22, 1900. Captured 

 by Mr. and Mrs. S. L. Hinde, at Macliakos Road, British 

 East Africa (about 5400 feet). Very faint traces of the 

 sub-apical white band of chrysipp^is can be detected, 

 la. L. chrysip^iHs, fovm klugii, under-side $, Oct., Nov. 1900. 

 Collected by W. Doherty on the Kikuyu Escarpment, 

 British East Africa (6500 to 9000 feet). Distinct traces 

 of the sub-apical white band of chrysippus can be seen. 

 Compare Fig. la, Plate XIV. 



2. Mimacrxa dohertyi ^, Oct., Nov. 1900. Collected in the 



same locality as Fig. la, by W. Doherty. The position 

 and outline of the costal part of the sub-apical white bar 

 of M. marshalli can be distinctly traced in the contour of 

 the black markings, although the bar itself is only very 

 faintly paler than the fulvous ground-colour of the wing. 

 Compare Fig. 2, Plate XIV. 

 2«. M. dohertyi, under-side ^, Oct., Nov. 1900. Collected in 

 the same locality as Fig. la, by W. Doherty. Traces of 

 position of white bar as in upper-side ; compare Fig 2a, 

 Plate XIV. The black spots on the under-side of the 

 under-wing resemble Acrsea encedon (Fig. Sa) rather than 

 the Danaine model of both insects (Fig. la). 



3. Acr^a encedon, form daira $ , June 6, 1900. Captured by 



Mr. and Mrs. S. L. Hinde, at Machakos, British East 

 Africa (about 5400 feet). Faint traces of the sub-apical 

 TRANS. ENT. SOC. LOND. 1902.— PART III. (NOV.) 37 



