Any idea what kind of bug this is?

they come in the plumbing vents on your roof. get screen drain covers for your sinks. keep your bathroom sink and tub drain plugged unless you are using them. also plug the overflow holes with aluminum foil in your bathroom sink. this will help, in my hut in florida that is what i do with boric acid under the stove and refrigerator. we don't have them at my place in the mountains of pennsylvania.