Specifically the Brown Marmorated Stinkbug which has apparently been
in the US less than 15 yrs. This is my 1st experience with any kind
of stinkbug.

Suspend SC (Deltamethrin 4.75%) kills them but they die slowly and you
have to squirt them directly. Walking across a dry film layer of the
poison seems to have no effect.

But here's the rub: Everybody goes ballistic about their odor when
squished. Well, over the past seven days, I have squished about about
two dozen inside the house and at least 1,000 outside on the cedar
siding or in the garage with a fly swatter. I cannot smell a thing
even though possessing an excellent olfactory sense. Hell, I can
smell a fart at 20 yards. Guess I should be thankful small blessings
in dealing with this nuisance.