In lieu of this continuation, there will not be a new quiz question. The black carpenter ant, Camponotus pennsylvanicus , is probably the most encountered member of this genus in the state, at least in the northern half. This might be doubtful as we move toward the coast. First the literature. Colonies can also be found living in voids which are seemingly dry.
Hedges goes on to list a number of void nesting sites.
Some that may be found in structures are under attic insulation, wall voids, voids under bay windows, hollow wooden doors, under bathtubs, etc. The above statements are not associated with any particular species. I will list two from the above edition of Mallis. A faint, rustling sound in walls, floors and woodwork is another common clue to the presence of carpenter ants. Furniss work was done in Oregon.