The dark green or verde oliva 2 as Hellrider said was used in the "mimetica continentale" scheme used by the regia aeronautica at the beginning of the war on different planes.
The first mottled camo on 202 was used by the ones of 4 stormo sent in Africa in November 41, that painted some giallo mimetico 4 puffs over the dark green.
One interesting feature regarding the later Mediterranean scheme of the macchi is that is different depending on the builder of the plane. All used nocciola chiaro 4 as base with Verde Oliva scuro 2 for the splashes.
The ones built by Macchi had the rings or in Italian "anelli di fumo", SIAI and Breda ones had more classic puffs.