Myrmecologist Ricardo Solar illuminates a large Azteca carton nest on the campus of the Universidade Federal de Viçosa. Viçosa, Minas Gerais, Brazil

Myrmelachista ruszkii nests in the hollowed-out center of twigs and branches. Monte Verde, Minas Gerais, Brazil

Myrmelachista ruszkii Monte Verde, Minas Gerais, Brazil