Hi Kale^^,
It is 201 % sure that orphaned Lasius niger workers lay eggs from which they rear males. It has been suggested that in a few instances even workers may develop from worker-laid eggs.
@ Kiam: If it is true that you did not receive any eggs or larvae with your colony, there is one interesting possibility:
A certain percentage of swarming Lasius niger queens is parasitized by a fly that lays its eggs onto the flying queens. The fly larva (usually one) penetrates the queen and grows on the body reserves of the ant queen. Eventually the fly larva is “born”, creeps out of the surviving queen, and pupates in a so-called puparium.
The ant queen is caring for the foreign pupa until the young fly hatches.
So, I suggest that you watch closely what will happen to the two pupae. Would be interesting if flies would hatch!
One question, however, then would remain: Where are the workers from that you have received together with the queen? – A parasitized L. niger queen never lays eggs or rears own offspring. For answering this question, however, we have to wait for the creatures that will come out of the pupae.
Or could you provide a good picture of the two cocoons? It is possible to differntiate between ant cocoons and fly puparia.
Earlant