Noun | 1. | family Psychodidae - very small two-winged flies with hairy wings that develop in moss and damp vegetable matter: sand flies arthropod family - any of the arthropods Nematocera, suborder Nematocera - mosquitoes; fungus gnats; crane flies; gnats; sand flies psychodid - a fly of the family Psychodidae genus Phlebotomus, Phlebotomus - small bloodsucking sand flies that resemble moths |