fungus gnat vs dipterous insect

fungus gnat and dipterous insect both are nouns.

Word	Noun	Adjective	Verb	Adverb
fungus gnat	Yes	No	No	No
dipterous insect	Yes	No	No	No

As nouns, dipterous insect is a hypernym of fungus gnat; that is, dipterous insect is a word with a broader meaning than fungus gnat:

fungus gnat: mosquito-like insect whose larvae feed on fungi or decaying vegetation
dipterous insect: insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing

Other hypernyms of fungus gnat include dipteran, dipteron, two-winged insects.

As nouns, dipterous insect is a hypernym of fungus gnat; that is, dipterous insect is a word with a broader meaning than fungus gnat:

fungus gnat: minute blackish gregarious flies destructive to mushrooms and seedlings
dipterous insect: insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing

Other hypernyms of fungus gnat include dipteran, dipteron, two-winged insects.

fungus gnat (noun)	dipterous insect (noun)
mosquito-like insect whose larvae feed on fungi or decaying vegetation	insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercing
minute blackish gregarious flies destructive to mushrooms and seedlings