These illustrations are by a team of two artists that call themselves Kozyndan. According to their own description of themselves they are:
“Los Angeles based mad scientists. they are working on a secret formula for controlled nuclear fusion, and are creating a line of edible chickens. For fun they like to take long deep breaths and dip their heads into bowls of rasberry jelly and lemon curd. They live indoors and don’t paint on walls. the couple also moonlights as freelance illustrators.”
My kind of people :) You can check out more of their work at kozyndan.com, they’ve got a lot of cool stuff on their site if your into weird-ish illustrations.