Adela septentrionella
| Adela septentrionella | |
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| Species: | A. septentrionella
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| Adela septentrionella | |
Adela septentrionella is a moth of the Adelidae family 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.
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