Naval commando operator, in the diving suit used for the action in Alexandria harbor during the night of december 18 -19, 1941. DVX

Gamma operator

As I said Ascari were Italian colonial troops, generally infantrymen, but not only (cavalry, police, navy, artillery, etc. too, even paratroopers). 
Zaptiè were colonial carabinieri and I posted a color picture of them here
http://www.ww2incolor.com/italian-forces/zapti__0002.html
Other specialties were Dubat, Meharisti, Bande Amhara (cavalry gerrilla and anti-guerrilla units)...
In the picture Ascari of PAI (Polizia Africa Italiana). 
Note that they're armed with MABs 38, as usually PAI policemen.

Ascari of PAI

Regia Aeronautica’s Macchi MC.202 “Folgore” of the 4th Stormo, on Italian Mainland airfield. The bright green of the grass and the pilot’s dress suggest the beginning of the Spring, likely 1942. Victor Sierra