Adela septentrionella

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Adela septentrionella
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Adelidae
Genus: Adela
Species: A. septentrionella
Binomial name
Adela septentrionella
Walsingham, 1880[1][2]

Adela septentrionella is a moth of the family Adelidae or fairy longhorn moths. It was described by Walsingham in 1880. It is widespread from southern British Columbia and north-western Idaho to the Transverse Range in southern California.

The length of the forewings is 4.5–5.7 mm. The forewings are purplish-black with two incomplete thin white bands. The antennae of the males are at least twice as long as the wings. The hindwings are uniformly dark.[3] Adults are on wing from mid April to mid July.[4]

The larvae feed on buds of Holodiscus discolor. Full-grown larvae overwinter in cases on the ground. Pupation takes place in late March or April.