Synonyms for locust

It appears there aren't any. Apart from grasshopper and insect and cicada, none of which will do. I might check out the latin name, but I'm not convinced that will cut the mustard either.

What is this for, I hear you ask. It's for the latest exercise in my online poetry course with Jen Hadfield and The Poetry School

I am trying to 'negate' Robin Robertson's 'Drowning in Co Down' and somehow my negation of a poem about water and weight and drink has let me to locusts.

Some days I'm gobsmacked my brain works at all.