A coloração avermelhada do abdômen indica que a formiga esta parasitada por Myrmeconema, ver https://www.journals.uchicago.edu/doi/abs/10.1086/528968 e https://link.springer.com/article/10.1007/s11230-007-9125-3 e https://meridian.allenpress.com/journal-of-parasitology/article-abstract/99/1/155/7083/The-Geographic-Distribution-of-Parasite-Induced
One of the most difficult species groups of Cephalotes to identify. Maybe its a C. pallidoides, but i cant say that for sure now.
Encontradas em um caixa de meliponario (Mandaçaia)