WCascoplecia
WAnisopodidae
WBibionidae
WBlephariceridae
WBolitophila
WCecidomyiidae
WCeratopogonidae
WChaoboridae
WChironomidae
WCorethrellidae
WMosquito
WCylindrotomidae
WDeuterophlebia
WDiadocidiidae
WDitomyiidae
WDixidae
WKeroplatidae
WLimoniinae
WLygistorrhinidae
WMycetophilidae
WPediciidae
WPerissommatidae
WPtychopteridae
WRangomaramidae
WScatopsidae
WSciaridae
WBlack fly
WTanyderidae
WThaumaleidae
WCrane fly
WTrichoceridae