I also wanted to say that I've got several Monarch cats right now in my garden, on a butterfly weed plant. Also, some Eastern Black Swallowtail cats, as well as a few very small cats that I have yet to identify. Those are both on the parsley.
I've had MANY Monarchs in the last month especially, but always some even in early summer.
Here is a picture of one of the cats, taken on August 18th: