I saw these caterpillars in my garden, and didn't recognize them.  However, I did recognize the plant they were eating: Passionflower.  I have been resisting pulling it out all summer, hoping it would bloom.  I got no blossoms, but this may be better;  I love raising butterflies.

 

I went to the Stokes Butterfly Book and discovered that Gulf Fritillaries use passion vine for a larval food plant.  Then, I looked up Gulf Fritillary to see what their caterpillars look like.  Guess what!!!  They look like that!!

 

Here is the adult on an onion blossom.  It was very close to where I discovered the caterpillars.

 

 

I'm so glad I found a picture of this butterfly.  I took the picture back in early June.  I wonder if this is the mom.  

 

 

HAPPY GARDENING!!