The animal I’ve been working with in my class lately is the beautiful beastie, Drosophila melanogaster. While I was cleaning out some stocks, I found this lovely example, a pale lady. She is a white mutant, and so lacks the normal red pigment in her eyes. In addition, she had just recently eclosed from her pupal case, and although her wings looked neat and pressed, her cuticle hadn’t yet fully tanned. She looked even more ghostly when I first spotted her, and was visibly darkening as I put her under the camera. Here’s a close-up. It’s amazing how every hair…