''Mydaea ancilla'' is a

fly Flies are insects of the Order (biology), order Diptera, the name being derived from the Ancient Greek, Greek δι- ''di-'' "two", and πτερόν ''pteron'' "wing". Insects of this order use only a single pair of wings to fly, the hindwing ...

from the family Muscidae.

References

Muscidae Diptera of Europe Insects described in 1826 {{Muscidae-stub