oestrus actaeon

from The Collaborative International Dictionary of English v.0.48
Stagworm \Stag"worm`\ (st[a^]g"w[^u]rm`), n. (Zool.)
   The larva of any species of botfly which is parasitic upon
   the stag, such as {Oestrus actaeon}, or {Hypoderma actaeon},
   which burrows beneath the skin, and {Cephalomyia auribarbis},
   which lives in the nostrils.
   [1913 Webster]
    

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