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Syrphidae
Didea alneti (Fallen)
SUMMARY
Didea species are large with broad flat abdomen bearing strongly emarginate or narrowly divided yellow, yellow-green, or pale green bands; eyes with moderately long but extremely sparse pili; and metasternum pilose. Didea alneti has the basal half of cell BM microtrichose on apical two-thirds or more, and tergum 4 with a yellow fascia narrowly divided.