Slide showing diagrams of the cross breeding of two varieties of magpie moth, Abraxas grossulariata, and lacticolor. Slide shows black and white diagrams of the cross breeding of two varieties of magpie moth, Abraxas grossulariata, and lacticolor. There are eight drawings of the moths in various stages of cross-breeding. Title below images reads: 'Fig. 75. - Cross between Abraxas grossulariata female and lacticolor male.' Late 19th to early 20th century