After feeding for a few months, the larvae go into dormancy while covered in ground matter. In spring, the larvae resume feeding and pupate. By June or July, adults emerge, all from the same generation that was laid in the previous fall.
Following a period of nourishment for several months, the larvae transition into a state of reduced activity while surrounded by soil particles. In the spring, they resume their feeding cycle and undergo transformation. By June or July, adults appear, all stemming from the same cohort that was deposited the previous fall.