Dasybasis gentilis 
Dasysyrphus albostriatus 
Dasysyrphus intrudens 
Deer fly 
Delia antiqua 
Depressa atrata 
Dialysis rufithorax 
Diamesa nivoriunda 
Dichetophora obliterata 
Didea fuscipes 
Dideopsis aegrota 
Didymomyia tiliacea 
Dioctria linearis 
Dioctria oelandica 
Diogmites neoternatus 
Dioxyna sororcula 
Dipalta serpentina 
Dogwood Rivet Gall 
Dolichopus reflectus 
Dolichopus ungulatus 
Dotted Bee Fly 
Down-looker fly 
Downlooker snipefly 
Dune Robber Fly