I suppose it could be said that the guitar would be covered by his etc... Also note he only mentions the 'chitarrino' (small 4 course instrument?) in his list of embellishing instruments and omits the larger (5 course) guitar. This, I suggest, implies that the guitar does indeed fit with the other continuo realisation instruments covered by the etc....
Agazzari says: 'chitarrina', not 'chitarrino'. What is a chitarrina? Was it strummed, like the chitarra spagnola? Lex To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html