^Explanation of Plates. 563 



Explanation of Plate XVI. 



Common Warning Colours of Mashonaland Acr.eine 

 Butterflies, etc. 



All the figures are about ttt of the natural size. 

 All tlie specimens represented on this Plate were captured by Guy 

 A. K. Marshall at Salisbury, Mashonaland, 5000 feet. 



Fig. 1. Acrxa douhledayi, form cu-inn ^ , Dec. 31, 1898. 



3. „ caldarena ^, Dec. 31, 1898. 



"*• )) )) + >) )) 11 



5. „ nohara, form luilali (^ , Dec. 31, 1898. 



"• 11 1) 11 11 V 11 11 11 



7. „ rahira ^, Dec. 31, 1898. 



"• 11 » + 11 11 11 



9. ,, violarum, form asemo, 5, Dec. 31, 1898. 



The above five species were therefore captured on the same 

 day in the same place together with other examples of 

 all species except rahira, as described on p. 492. The 

 group is a beautiful example of synaposematic (Miillerian) 

 resemblance between the species of a specially-protected 

 groiip iidiabiting the same locality. 



10. A. anemosa $ , Jan. 7, 1899. 



11. A. natalica, $ „ „ 



A male of anemosa and a second female of natalica were 

 captured on the same day. Another beautiful example 

 of synaposematic resemblance between two fine species. 



12. A. doribledayi, form axina $ , April 6, 1898. 



13. Baoris netopha ?, April 6, 1898. 



The Hesperid at rest with its wings closed is a mimic of the 

 smaller Acra^as such as that shown in Fig. 12. There 

 are several white spots on both upper- and under-side of 

 the fore-wing of the skipper, but these are concealed by 

 the hind-wing in the position of rest with the fore-wings 

 pressed well back between the hind. In the specimen 

 figured the fore-wings are not quite sufficiently far back, so 

 that the border of the dark shade which should be entirely 

 concealed is exposed together with a part of the most 

 anteriorly-placed white spot. 



