I am always suspicious of ant sized winged insects I find in the house as I dont want to have termites or carpenter ants. Here's something I found this summer (eastern washington resident). I vote wasp, based on the narrow waste, and the pointed abdomen, and the fact that the tail was pulsing like I think a wasps does. Is this a wasp? What should I look out for with respect to destructive house invading social insects? Jay (Images taken with macro setting on Sony TX5 point and shoot waterproof camera).