bulb fly

noun

a hoverfly the larvae of which live in bulbs and can become ser ious pests, esp the yellow and black narcissus bulb fly (Meridon equestris)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012