That describes the workers of most termite species.
The wings only show up during swarming season for our more common species. These are secondary reproducers leaving an existing colony to start a new elsewhere. Once the flight is over the wings fall off.
If it is a subterranean species, they are coming through a crack/hole in the foundation of your home. Find the point of entrance and treat it, this will move them to a different location of your home.
Identification is the key to a successful treatment.
What is the truss system of your roof made of???