Fly decapitates ants, lives in their heads

Fly decapitates ants, lives in their heads:
A new fly discovered in Thailand is the world's smallest. It is five times smaller than a fruit fly and tinier than a grain of salt (0.4 millimeters) in length — half the size of the smallest "no see-ums." It probably also feeds on tiny ants, likely decapitating them and using their head casings as its home.