Larvae of P. alceae feed on decaying plant and animal material and .

[2] The males of P. alceae were reported to court with an elaborate dance.

The courting male may move his fore legs up and down in front of the female.

He may also shake his fore legs, turn sidewise to his partner and lift one of his wings, tap on the head or thorax of the partner and probe her with his proboscis (mouthparts).

This article related to members of the fly family Ulidiidae is a stub.