Classic 60s Wasp from the moleskin sketch book. I thought about printing out some of these but I'd really need a scanning ninja to do it properly for me. They always look so much nicer in the book.
I think this is one of the great superhero costumes, by the way, though I recognize it would look pretty out of place nowadays. When Janet inevitably comes back from the dead I hope she brings back the thorn-head look.