Featured in these images is a Weaver-ant queen (Oecophylla smaragdina). After a queen has mated with a male, she will descend to the ground, search out a suitable place for a nest, and bite off her wings and lays eggs.
You can see from these images, however, that this one hasn’t lost her wings yet. It is clear that she hasn’t yet found a nest yet.
When I found her, she was wandering about , perhaps in search of a nest. Strangely, it seemed to be quite aggressive, as you may note from the images, with jaws open and ready to bite.
Alternatively, this one may also be the result of a failed mating…perhaps a diseased female, biding her time in her final moments…who knows!