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Photo#262386
Cottony cushion scale (Icerya purchasi)? - Icerya purchasi

Cottony cushion scale (Icerya purchasi)? - Icerya purchasi
Carpinteria Salt Marsh Nature Park, Carpinteria, CA, Santa Barbara County, California, USA
March 29, 2009
Size: ~1 cm
This insect was on the stem of a coyote brush (Baccharis pilularis). I'm wondering if it might be a cottony cushion scale (Icerya purchasi).

Cottony cushion scale
Looks good to me. There's only one other species that looks remotely similar, and I think it's only in Florida (with a much longer egg sac, if I remember correctly)