i'm doing this science crossword and it's graded

does anyone know an 8-letter word for...
QUOTE
an insect that tricks potential predators into thinking it's a wasp


the fifth letter is either "R" or "C", unless i got that wrong (insect that resembles a thorn on a branch--i put "thornbug")


many thanks in advance for whoever answers this insanely impossble problem (well, for me it is)