Myrmecocystus flaviceps is a monogynous ant species with a medium development rate. The queen measures 11–12 mm, while the workers range from 4–8 mm. They typically display a reddish head and thorax with a darker gaster. This species is known for its honey pot workers (repletes), which store liquid food in their distended abdomens.

They feed on insects, syrups, fruits, vegetables, and protein-rich foods. Humidity should be maintained at 40–60% in the arena and 50–70% in the nest, while the temperature should remain between 23–30 °C in the arena and 22–26 °C in the nest.

Myrmecocystus kennedyi is a monogynous ant species with colonies reaching up to 5,000–8,000 workers. They develop at a moderate pace. The queen measures approximately 12–14 mm in length, while workers range from 4.5 to 7 mm. Their body is typically light to reddish-brown, with a slightly darker gaster, and they have a somewhat glossy appearance. As with other species in the genus, repletes (specialized workers that store food) may be present in mature colonies. Their diet consists of insect prey, sweet substances like nectar or syrup, fruit, jelly, and protein-rich foods such as cooked egg or chicken.