I've just recently discovered a range map site for ants: antmaps.org.
Image: Interactive range map for L. niger from antmaps.org
From the site's about section:
antmaps.org is not a database per se, but rather a client-end tool for visualizing and interacting with the GABI database. The Global Ant Biodiversity Informatics (GABI) project (Guénard et al. 2017 Myrmecological News) is an attempt to consolidate and curate a comprehensive global database of ant species distributional records, including literature records, museum databases, and online specimen databases.
As of July 2018, the database includes records from over 9300 publications, most major digitized museum collections, and specimen databases such as AntWeb. In total, the database now has over 1.9 million records including around 15000 described ant species and subspecies. The GABI data are currently housed in a PostgreSQL database that synchronizes once per week with antmaps.org.
The site also suggests other useful ant websites:
Antmaps.org is intended to complement other invaluable web tools for myrmecology such as AntWeb and AntWiki.
Guénard, B., Weiser, M., Gomez, K., Narula, N., Economo, E.P. (2017) The Global Ant Biodiversity Informatics (GABI) database: a synthesis of ant species geographic distributions. Myrmecological News 24: 83-89.
antmaps.org paper to cite if you view data using this tool: Janicki, J., Narula, N., Ziegler, M., Guénard, B. Economo, E.P. (2016) Visualizing and interacting with large-volume biodiversity data using client-server web-mapping applications: The design and implementation of antmaps.org. Ecological Informatics 32: 185-193