IX WARNING COLORATION AND MIMICRY 241 



cases as to be mistaken when on the wing, and the difference 

 only to be detected by close examination. As an example of 

 the resemblance, woodcuts are given of one pair in which the 

 colours are simple, being olive, yellow, and black, while the 



Fig. 23.— Methona psidii (Heliconidae). Leptalis orise (Pieridae). 



very distinct neuration of the wings and form of the head and 

 body can be easily seen. 



Besides these Pieridse, Mr. Bates found four true Papilios, 

 seven Erycinidae, three Castnias (a genus of day-flying moths), 

 and fourteen species of diurnal Bombycidae, all imitating some 

 species of Heliconidae which inhabited the same district ; and 

 it is to be especially noted that none of these insects were so 

 abundant as the Heliconida? they resembled, generally they 



R 



