Wormil

 Any botfly larva which burrows in or beneath the skin of domestic and wild animals, thus producing sores. They belong to various species of Hypoderma and allied genera. Domestic cattle are often infested by a large species. See Gadfly. Called also warble, and worble.  [1913 Webster]

 See 1st Warble, 1 (b).  [1913 Webster]