Debi
You have a cottonwood borer in your jar. This beetle and its larva feed on poplars and willow trees. The adults supposedly feed on shoots of host trees, especially leaf-stems (petioles), and bark.
Life Cycle of this beetle involve eggs being laid in August/ September. Larvae bore at the base of poplars or willows and then overwinter there. Two or three years required to reach maturity. Larvae may girdle trees. Pupation occurs beneath bark.
They are quite striking large beetles. Do you have a lot of cottonwood trees or willows nearby?
