In small beetles it so happens that the beetle places a packet of sperms in her reproductive canal and if any eggs fertilises them . the reproductive canal is at the back of the she - beetle
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When a male beetle is ready to mate, he will stroke the female with his antennae and will climb onto her back. If she is receptive, he will place a packet of sperm inside her reproductive canal. That sperm will fertilize the eggs she produces for a season. When all of her developed eggs have been fertilized, she will release them.