Explanation of Plate B. 



Synaposematic Mylabrid beetles occurring together at Ibadan, 

 S. Nigeria. (Slightly less than natural size.) 



All figs, except the last four are of pairs taken in coitu, the males 

 to the left. 



Fras. 1-6. Decapotoma {Decatoma) affinis. 

 7-8. Coryna hermanniae. 

 ,, A-O. Myldbris farquharsoni. 



9-15. M.hermannioides; I = var. lamhorni. 



