Hello,
i had my Myrmecocysus Mexicanus in a test tube until recently and they spinned cocoons.
However i moved them to a THA mini hearth and i added some sand/substrate for them and they piled it up.
Despite this my ants put their brood on the water tower and i just noticed today that there are 2 larvae which became pupae without spinning a cocoon
i don't understand what is happenning, has anyone already experimented this ?