f. BUTTER + FLY; with Old English buttorfléoge cf. Dutch botervlieg, earlier botervlieghe, modern German butterfliege. The reason of the name is unknown: Wedgwood points out a Dutch synonym boterschijte in Kilian, which suggests that the insect was so called from the appearance of its excrement.</derail>
posted by creasy boy at 9:44 AM on August 23, 2007