I seem to remember the eggs being on the top side of leaves for that species, Melanie. I found one Queen caterpillar today. Had seen a Queen butterfly a week or so ago, but it didn't stick around long. I've actually only been checking the milkweeds to remove Swamp Milkweed Beetles, eggs or larva, since those pests can do a lot of damage to the plants. For once, there's a really good chance of getting enough seeds from my A. texana plants, so I really don't want the beetles around!
