Noun blackfly has 2 senses
  1. blackfly, bean aphid, Aphis fabae - blackish aphid that infests e.g. beans and sugar beets
    --1 is a kind of aphid
    --1 is a member of Aphis, genus Aphis
  2. blackfly, black fly, buffalo gnat - small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals
    --2 is a kind of gnat
    --2 is a member of Simulium, genus Simulium
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