I'm posting this as a tip that may help others.
My first indication of termites was Thursday morning. (Last year they didn't enter until April; must be the mild NJ winter that moved their swarming schedule up.) I couldn't get the exterminator to treat the house until six days later. The termites had been entering almost as fast as I could vacuum them up. Five minutes later, there would be more. Scary thought that I'd have to fight them for six days.
The two entry points are at the top miter joints where the three door casings met. (That door is in a wall that was originally an exterior wall; since the addition, it's now an interior wall. Slab foundation under original house and addition.)
Solution: spray water on the entry points. A single spray might last 24 hours or even more, but to be on safe side I spray twice a way. Not a single one since.