The Spathiphyllum (Peace Lily) is not a true lilium - however, is a very popular houseplant. Don't know how it reacts to being outdoors aside from picking up bug pests from the soil, etc. which you might bring back in the house.

Bring it back in the house, keep the dog away from it and it will most likely regenerate in a while. They're hardy and hard to kill... but a houseplant, not a garden specimen.

I have 2 Peace Lilys from my dads funeral on 3/25/10. When I was watering them I noticed "worm" looking things in the soil the plants came in. They almost look like mini catapillers. I sprayed an organic soap in the soil & it didnt kill them so I tried using Fungicide. What should I do? I dont want them to die but I have a "black thumb" when it comes to house plants. Also the leaves on them are starting to turn down & tips look curled. HELP me save my Peace Lilys PLEASE.

Have you tried the houseplant forum?
http://forums2.gardenweb.com/forums/houseplt/

Here is a link that might be useful: Houseplant Forum

Using a fungicide on a worm wasn't a good idea. That is likely why your leaves are browning and curling...

Repot the spaths into fresh bagged potting soil and keep them evenly moist not soaking wet but don't allow to go bone dry.

They are medium to low light houseplants and putting them outdoors is not a good idea, you can fry them easily. You can fry any houseplant by setting it out in the sun.