Crane fly and Dipteran

Crane fly noun - Long-legged slender flies that resemble large mosquitoes but do not bite.

Dipteran and crane fly are semantically related. In some cases you can use "Dipteran" instead a noun phrase "Crane fly".

Dipteran noun - 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.

Crane fly and dipteran are semantically related. Sometimes you can replace phrase "Crane fly" with "Dipteran", this terms are similar.