Provides a detailed introduction to the embryonic development of insects. Topics include: Reproductive systems; Male and female gametogenesis; Sperm transfer and use; Fertilization; Sex determination; Parthenogenesis; Embryogenesis; Postembryogenesis; Hormones; And the role of ontogeny in insect evolution. Summaries for each of these topics cover structural events, comparative aspects, and hormonal, genetic, and molecular causal analyses. Heming treats examples throughout the hexapods with frequent reference to the evolution and development of other invertebrates. He also compares insects to vertebrates and places insect development into context with fossil evidence and earth history.