Psiloi

[hoplite14gr]

Are you talking about the Osprey book, "The Ancient Greeks"? Yes, I have it... This is one of Osprey's better titles..!
Johnny

The original potery fro this reconstruction exist in a photo in Osprey's "Greek Hoplite" I think. This would repesent an Archaic Era psilos or the initial Laconic helot.
There were ares in Central Greece like Phokis and Lokris where a portion of the field army would be "Psiloi" due the more restricted finances.
These men would carry rounded pelta unlike the cresent shaped Thrakian pelta and javelins an possibly a dagger.
Only Opundian Locrians possibly had white "thracic" pelta with a brown snake as their emblem,
Aditional weapons would be small axes doubling as weapons and tools.
A reconstructed iron axe of these type exists in the www.4hoplites.com website.
Rhodians were the most famous slingers but possibly Spartan helots used them too (Arimnistos killed Mardonios in Platea with as ling)
Slingers would carry a wicker or leather shield.
Cretan archers sometimes would fight in open order as psiloi with lesser armor than usual.
Various types of straw hats and cups would be available to them.
Athenians were unique that they would employ Skythian slaves as policemen or support troops making use of their archery skills.

If they got engeged in a fight near the camp ,malets or butchers cleavers would be employed in absence of better weapons.
Hope I helped
Kind regards