Bug Butts!

Dharma Trading has a short feature in its newsletter on cochineal (red dye producing insect, which replaces/d the carmine made from the related kermes insect in Europe:
http://www.dharmatrading.com/html/eng/5763385-AA.shtml

(P.S. apparently Dharma is now selling organic cotton Tshirts, in sizes to 3x; I've had good luck with their large sizes.)