Scaeva relicta Zetterstedt, 1838:603 Parasyrphus relictus Zetterstedt Stenosyrphus melanderi Curran 1925:103 Parasyrphus melanderi is a flower fly (family Syrphidae) that is best known as a larval predator on the leaf beetle Chrysomela aeneicollis in the Sierra Nevada range of California.

[3] The holotype of this species was collected by Doctor Melander on Mount Constitution, Washington on July 22, 1919.

[1] Populations have been documented feeding on Chrysomela aeneicollis in the eastern Sierra Nevada, California.

[3] These flies are found in cool moist habitats near lakes or streams, where their larval prey (Chrysomeline leaf beetles) occur.

[1] Parasyrphus melanderi is a major natural enemy of Chrysomela aeneicollis, a leaf beetle in the subfamily Chrysomelinae.