WARNING COLOURS 215 



the course of which we both independently arrived at 

 the opinion that it is adapted to serve as a warning 

 to other parasites that the larva is already * occupied.' 

 The eggs, being black, somewhat resemble the scars 

 caused by the introduction of internal eggs, so that 

 the species which deposit such eggs may be warned 

 off, as well as those of the genus Paniscns, 



