excavatrix

Probably from the scientific Latin specific epithet excavatrix. By surface analysis, excavate +‎ -trix.

excavatrix (plural excavatrices)

1. (rare) A female that excavates; a female excavator.
   • 1911, Jean-Henri Fabre, translated by Alexander Teixeira de Mattos, The Life and Love of the Insect, A. and C. Black, page 134:

     Later, the excavatrix becomes a baker: she kneads the cakes for the children into cylinders; the father is then the baker’s boy.