[W/K] :: blackfly

  black fly \black fly\, blackfly \blackfly\, (Zool.)
     1. In the United States, a small, venomous, two-winged fly of
        the genus Simulium of several species, exceedingly
        abundant and troublesome in the northern forests; --
        called also buffalo gnat. The larv[ae] are aquatic. It
        sucks the blood of birds as well as humans and other
        mammals.
        [WordNet 1.5 + WordNet 1.5]
  
     2. A black plant louse, as the bean aphis ({Aphis fab[ae]),
        which infests e. g. beans and sugar beets; -- called also
        bean aphid.
        [WordNet 1.5]

  blackfly
       n 1: blackish aphid that infests e.g. beans and sugar beets [syn:
             bean aphid, Aphis fabae]
       2: small blackish stout-bodied biting fly having aquatic
          larvae; sucks the blood of birds as well as humans and
          other mammals [syn: black fly, buffalo gnat]