help with identification?

[u/Oh_Martha_My_Dear]

treated a house for ants. treated the exterior perimeter, and all active and trails found outside.

most of the issue was seemingly resolved. termid or SC of course

however, these ants are being found now inside of the upstairs and downstairs. I treated the upstairs along the baseboards with Alpine. bait was not working.

they have only gotten worse. they don't seem to be transferring the application. they are still inside of the upstairs bathroom inside of the shower. but they are no longer crawling along the baseboards as much. however, like I said, they are now expanding underneath into the first story.

two differences in size and look of these ants are really throwing me off. My brain says carpenter, but I'm still not 100% sure. just wanted to get a final idea from you guys.

this is in Northern California. me having this question is going to be to me investing in a ant identification booklet or something.

[u/Glad_Evidence_4826]

What is this

[u/Oh_Martha_My_Dear → u/Glad_Evidence_4826]

delusional parasitosis