My undergraduate thesis at Cornell University examined the nest structure of an east African acacia-ant, Crematogaster mimosae. These ants have very similar behavior to the Pseudomyrmex plant-ants that I studied during my PhD, protecting their host plants against herbivores and disease. I developed microsatellite markers for this species and, with the collaborative efforts of Ross Anderson and Devin Kennedy, developed a method for using these data to infer the number of queens present in each colony. I found that polygyny is common in this species and is possibly a result of the intense nest-site competition among these ants. I reported these findings in Insectes Sociaux.