EXPLANATION OF FORM AND COLOURING. 385 



P. echerioides very low, and in this is borne out by other birds ; at the same time it 

 is liighly suggestive that the drongo, which at first placed not only P. echet^ioides 

 but other Papilionince in the neighbourhood of A. cctUlarena, should have promoted 

 them, after fuller experience, to about the places they occupy in Roller B's list — 

 P. echerioides actually considerably higher. This, in conjunction with that roller's 

 treatment of P. angolamis (v, Terias in B's list) and the fact that the kingfisher 

 kept the latter huttev^j perinanently in the neighbourhood of Alylothris, leads me 

 to suppose that it is not a matter of much diflference in preferences, but that the 

 taste of some of these Papilios must be reminiscent of that of some highly distrusted 

 insects — perhaps Danaida. 



C drew a far harder line than B between Grades 1 and 2. B very frequently 

 placed Grade 2 butterflies, and even those of Grades 3 and 4, in Grade 1. 



