May beetle vs figeater

May beetle and figeater both are nouns.

Word	Noun	Adjective	Verb	Adverb
May beetle	Yes	No	No	No
figeater	Yes	No	No	No

As nouns, figeater is a hyponym of May beetle; that is, figeater is a word with a more specific, narrower meaning than May beetle:

May beetle: any of various large usually brown North American leaf-eating beetles common in late spring; the larvae feed on roots of grasses etc.
figeater: large greenish June beetle of southern United States

Other hyponyms of May beetle include green June beetle.

May beetle (noun)	figeater (noun)
any of various large European beetles destructive to vegetation as both larvae and adult	large greenish June beetle of southern United States
any of various large usually brown North American leaf-eating beetles common in late spring; the larvae feed on roots of grasses etc.