entomology 2 (life cycle of cicada)

The cicadas stick close each other with their asses. After mating, the female will lay eggs in tree trunk. Eggs hatch next summer and larvae spend as long as six years in the ground before becoming adults. While they have this long larva period, the life of adults is rather ephemeral, which lasts only for a few weeks. Around the time when I am writing this post, the female in the photo might have already laid eggs and have gone. Can you tell which one is girl? Since the position of their private action is so different from ours, I cannot tell. Sorry.