Pogonomyrmex sp., probably P. californicus – harvester ants; were used as a hallucinogen and medicine by southern California Indians (Blackburn 1976, Groark 1996).

This genus of ants has the greatest mammalian toxicity known of any arthropod (Schmidt and Blum 1978, Groark 1996), with an intravenous LD₅₀ of 0.3-1.1 mg/kg (Schmidt and Blum 1978, Groark 1996).

For use as a ritualistic hallucinogen, in the context of a “vision quest” of Indian youth, harvester ants were eaten after three days of fasting from food, water, and sex and not contacting blood (Groark 1996). In the daytime at an isolated location fully exposed to the elements, an experienced elder administrator, the ant doctor, would lay the youth on their back and feed him, somewhat forcibly, balls of moistened eagle down with about 5 ants inside each (Blackburn 1976, Groark 1996). The dose was regulated, from dozens to ninety or so balls, and…