Jim,
I know that his is premature but here are some butterfly sites:
www.npwrc.usgs.gov/resour...flyusa.htm
butterflywebsite.com/
This is a book that has a lot of butterflies-catapillars and their scientific names. It also has host plants in the back of the book for the various species fo butterflies:
www.amazon.com/exec/obido...55-2747152
At the butterflywebsite.com they have a listing of public butterfly gardens. This is the only one that is near you. I have no idea how old this information is:
Gavilan - CA. Located at the Fantasy Faire in the ghost town of Gavilan Hills is a place where visitors often see the endanger Checkered Keno as well as Monarch, Swallowtail and many, many others. It is south of Riverside, bewteen Corona and Perris. A free scope is provided for close up viewing. It is a natural wildflower garden with walkways, a little frog pond and a big log to sit on while viewing. Thousands of caterpillar in the area every spring! Free admission and free parking, open Saturday and Sunday 9-5. (909)776-0391