Scale insects on Carpobrotus edulis.
Lots of taxonomic confusion here, but this seems like the current name to use in AZ. See http://canr.udel.edu/planthoppers/north-america/north-american-fulgoridae/genus-alphina-stal-1863/ and http://canr.udel.edu/planthoppers/north-america/north-american-fulgoridae/genus-calyptoproctus-spinola-1839/