As I'm from the UK I don't have much of an idea what you have in Egypt, so I may be wrong...
Vespidae > Polistinae - Paper wasp sp.
I apologise - I'm just too
inexperienced in Egyptian invertebrates, but I think I at least have the right family - I hope!!
I think the body-coloured wings will get you to genus
and the red markings to species
I'll continue trying to species-level tomorrow
EDIT: 25cms long
wow - 10 inches!!!!!