Thanks very much Iain, and its very much my pleasure adding what I can to the outstanding information you always present. I appreciate Ed's insight as well, and with his most important field work and well informed observations I think we can pretty much rule out native application on this wasp stamp.
I hope perhaps we might find corroborating examples, and possibly with any additional context we mind be able to establish a route for further research into the origins and period of the marking. The use of the wasp actually seems so well placed among the themes in these makings that I felt almost certain I had seen something like it. Apparantly the beehive and fly, as well as perhaps the scorpion were temporally present at the time, but carefully going through these compilations of marks turned up no matches.
Possibly Stephen Wood might have come across this marking in the considerable number of kaskara he has handled, so I hope he reads this and might comment. Meanwhile, the conundrum continues
All the best,
Jim