Trachymyrmex septentrionalis

Northern Fungus-farming Ant ( Trachymyrmex septentrionalis) - The species is common in eastern United States, where it inhabits sandy soils. It is the most widely distributed fungus-growing ant in the United States, known from Texas to Florida, north to Illinois, Ohio and New York. (the most extensive distribution of all attine ants in the US)
Fungus-farming ants, in the tribe Attini, have co-evolved with certain actinobacteria (especially Streptomyces and Pseudonocardia), which protect the ants’ cultivated fungi against pathogenic fungi (Escovopsis species). The Attini ants harbor actinobacteria in both the fungal gardens they cultivate and in biofilms on their exoskeletons.