INSECTS IN RELATION TO PLANTS 



267 



by butterflies. Lilies and orchids frequently employ butterflies 

 and moths, as well as bees, and the milkweed is adapted in a 

 remarkable manner for pollination by butterflies, moths and 

 some wasps, as was described. Honeysuckle, lilac, azalea, 

 tobacco, Petunia, Datura and many other strongly scented and 

 conspicuous nocturnal flowers attract for their own uses the 



FIG. 260. 



A butterfly, Polites peckius, stealing nectar from a flower of Iris vcrsicolor. 

 Slightly reduced. 



long-tonged sphinx moths (Fig. 259) ; the evening primrose, 

 like milkweed, is a favorite of noctuid moths. Umbelliferous 

 plants are pollenized chiefly by various flies, but also by bees 

 and wasps. Pond lilies, golden rod and some other flowers 

 are pollenized largely by beetles, though the flowers exhibit no 

 special modifications in relation to these particular insects. It 



