Larvae
In the subfamily Notiphilinae the head is reduced to a cephalic skeleton, there are no anterior spiracles and the posterior spiracles are extended as spines. The other subfamilies have larvae similar to the Sciomyzidae, with the posterior spiracles at the apices of divergent branches from a common base. They may be differentiated by short thoracic segments (like the abdominal ones) and by the absence of a ventral arch linking the mouth hooks.
Read more about this topic: Ephydridae