The first year I am growing fritillaria - Fritillaria imperialis (Crown imperial or Kaiser's crown) and I have visitors!
The red lily leaf beetle (Lilioceris lilii) is a beetle that eats the leaves, stem, buds, and flower, of lilies, fritillaries and other members of the family Liliaceae. http://en.wikipedia.org/wiki/Scarlet_lily_beetle
There are no registered chemicals for lily leaf beetle control, and no natural predators. :(
Pick them or/and use neem oil.
I picked them twice today into a jar with soapy water. I am glad I have only 4 fritillaries plants and my lily is just starting to grow.