Hi Keith,

I really can't tell the size but it sort of looks like a Carpenter ant.

https://ohioline.osu.edu/factsheet/HYG-2063

I need more information such as ; where are you seeing them?, what are they doing? and how big are they?

Sally Granath

St. Louis County MG

We’re no longer seeing them.  Previously we had been seeing them over a 2-3 week period of time.  They would be either on the kitchen counter, the kitchen floor or on the adjoining dining room floor.  We rarely saw more than one at a time and over the 2-3 week period probably saw a total of 14 ants.  They were generally quite big (seemed about 1/2” long or a little more), solitary, and very fast once they knew you were after them. As I said they seem to have now disappeared, however, we’d be interested in anything additional you might have to say. I’ve attached a few more photos to this note and for a sense of scale the aluminum capture containers are 1 3/4” in diameter. .

I think they are Carpenter Ants.

https://extension.umn.edu/insects-infest-homes/carpenter-ants

https://ohioline.osu.edu/factsheet/HYG-2063

They may just be scouting and not finding what they are looking for. Keep an eye out for them and if they reappear I would set out bait/poison.

Good luck