What is Eating my Lantana, and what can I do??

[yennta]

I love this plant, and last year it nearly died from whatever this is.
I trimmed it all the way back and fed it with superthrive.
It's a courageous, hardy plant and grew back, but it's under chronic attack. P.S. I'm in Southern California (zone 10)
[img]https://i1033.photobucket.com/albums/a416/yennta/Lantana%20Album/lantana_scourge_full.jpg[/img]
[img]https://i1033.photobucket.com/albums/a416/yennta/Lantana%20Album/medculantana.jpg[/img]
[img]https://i1033.photobucket.com/albums/a416/yennta/Lantana%20Album/medshotlantana.jpg[/img]