194 THE COLOUES OF ANIMALS 



cently, the British butterflies did not include an ex- 

 ample, but a large and handsome American Danaid 

 (Danais archippus) seems to be gradually extending 

 its range into every country where the food-pla.nts 

 (Asclepiads) of its larva are to be found. Several 

 individuals have been caught in this country of late 



FIG. 48. The North American Dnnais arch'ppus, which has now spread into 

 this country ; upper side ; iiiUI natural size. 



Pl&. 49. Danriis archippus, showing the conspicuous colours on the under 

 sides of the wings. 



years, and there is no doubt that it will thoroughly 

 establish itself if it can meet with a sufficient supply 

 of larval food, and can withstand the ceaseless energy 

 of collectors. It is far larger than any of our native 

 butterflies. It is shown half the natural size in 

 fig. 48, while fig. 49 gives the appearance of the 

 under side. The latter figure shows that the insect 



