Gustav Mayr

Gustav L. Mayr (12 October 1830 – 14 July 1908) was an Austrian entomologist and professor in Budapest and Vienna. He specialised in Hymenoptera, being particularly known for his studies of ants.

In 1868, he was the first to describe the Argentine ant. He is credited with naming the harvesting ant species, Aphaenogaster treatae, for naturalist Mary Davis Treat, in honor of her research on the species.