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 
Fic. 260. 
A butterfly, Polites peckius, stealing nectar from a flower of Iris versicolor. 
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 
