Family Psychodidae
Moth flies belong to the family Psychodidae and are also called drain flies because they often breed in drains. Moth flies are occasionally annoying in homes, sometimes appearing suddenly from sink and bathtub drains. They can breed in tremendous numbers in sewage treatment plants and then be carried by the wind to nearby buildings where they can crawl through ordinary fly screens.
Credit to: MALLIS HANDBOOK by Dr. Hanif Gulmahama