chalcid fly vs hymenopteron

chalcid fly and hymenopteron both are nouns.

Word	Noun	Adjective	Verb	Adverb
chalcid fly	Yes	No	No	No
hymenopteron	Yes	No	No	No

As nouns, hymenopteron is a hypernym of chalcid fly; that is, hymenopteron is a word with a broader meaning than chalcid fly:

chalcid fly: any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects
hymenopteron: insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing

Other hypernyms of chalcid fly include hymenopter, hymenopteran, hymenopterous insect.

chalcid fly (noun)	hymenopteron (noun)
any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects	insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing