chalcid vs chalcis fly

chalcid and chalcis fly both are nouns.

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

As nouns, chalcis fly is a hyponym of chalcid; that is, chalcis fly is a word with a more specific, narrower meaning than chalcid:

chalcid: any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects
chalcis fly: a variety of chalcid fly

chalcid (noun)	chalcis fly (noun)
any of various tiny insects whose larvae are parasites on eggs and larvae of other insects; many are beneficial in destroying injurious insects	a variety of chalcid fly