mirid bug vs leaf bug

mirid bug and leaf bug both are nouns.

Word	Noun	Adjective	Verb	Adverb
mirid bug	Yes	No	No	No
leaf bug	Yes	No	No	No

As nouns, leaf bug is a hypernym of mirid bug; that is, leaf bug is a word with a broader meaning than mirid bug:

Other hypernyms of mirid bug include plant bug.

mirid bug (noun)	leaf bug (noun)
a variety of leaf bug	small bright-colored insect that feeds on plant juices