Ficus galling wasp in Josephiella family. Been in Los Angeles areas for many years and the only remedy is to keep trimmed to lower foliage mass and remove cut foliage and dropped leafs from ground to lower re-infestation rates. However once you have them, you have them. I've had them on my hedge for years, its only unsightly, not life threatening. on the hedges we usually do a vigorous shear right around the time we see the galls appear and this will tend to remove a really good portion of the larvae and subsequent generations from the specific group of plants. https://palmbeachcountyextension.wordpress.com/2012/01/18/josephiella-wasp-galls-on-ficus/