Pseudomyrmex pallidus (Gyne shown)

Pallid Twig Ant (Pseudomyrmex pallidus) - (Gyne shown here)
Nests of this species are found in the hollow stems of dead grasses. Although they show a preference for herbaceous plants, nests have also been found in the dead stems of woody twigs.[1] Nests are generally found at the intersection of grassy and wooded habitats, possibly due to shading from the canopy in warmer months and exposure to sunlight in colder months. The entrance to the colony consists of a round to oblong entrance measuring 1–2 mm (0.04–0.08 in) on the face of the stem, and can easily be plugged by the body of a single worker to prevent access to the brood by predators. Stems containing P. pallidus are 5–10 mm (0.20–0.39 in) in diameter, and the excavated chambers are 11.8–72 cm (4.6–28.3 in) long.