Local hopping of the P{BmΔ-w}ligP1 insertion, resulting in a second P{BmΔ-w} insertion (P{BmΔ-w}ligPP5) inserted in the opposite orientation 885bp downstream of the original P{BmΔ-w}ligP1 insertion (which is still present).
Homozygotes show pupal lethality, forming long puparia.