Moved from Ichneumon Wasps.

I actually managed to find corresponding online images positively IDing this to Labena grallator, a parasite of wood-boring beetle larvae (in its own larval stage, of course).

Reminds me of members of Banchinae, along the lines of the Sphelodon genus. But then again ... this is Ichneumonidae we're talking about here. :)

an ichneumon wasp. There are many species, so it will be difficult to ID further. here is a similar specimen, also from Florida, but also unidentified :).

By the way, that is not a stinger, but an ovipositor. The female uses it to lay her eggs inside lots of cool things, including other insects' eggs!