a black stink bug, Murgantia histrionica, having red and yellow markings, that feeds on cabbages and other cruciferous plants.
Origin of harlequin bug
An Americanism dating back to 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a brightly coloured heteropterous insect, Murgantia histrionica, of the US and Central America: a pest of cabbages and related plants: family Pentatomidae
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