My original tumblr post was here. According to the ISFDB, this is an Australian publication. Pulp writer Oscar J. Friend has extensive writing credits. The image originally appeared at Mad Scientist Appreciation Guild.
Tumblr favorite #2718: The Molecule Monsters
Dr Faustus,
Please see http://www.pinnau.dk/pages/louis_moe.html (left side) for an early 20th century stort of Tiny Pet Butterfly Woman: compilation of 4 pieces called ‘The Fly’ from 1903