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SCIENCE, AND SOCIETY discuss a few examples briefly before trying to dissect or model their functions and reconstruct their evolutionary histories. In early June 1957 after several consecutive days of unsynchronized chorusing during rainy weather, the males of one of the two seventeen-year cicada species I was studying (Alexander and Moore 1958) suddenly (within a few seconds) entered into a massive synchrony extending several hundred meters, from one end of the forest to the other. The only record that could be made of this observation was a tape recording of the sound (Alexander 1960) and a line graph showing the regularity of highs and lows in the intensity of sound as recorded by a sound-level meter (Alexander and Moore 1958, fig.

The social Hymenoptera, comprising the ants, bees, and wasps, are almost exactly intermediate between the colonial 26 INSECTS, SCIENCE, AND SOCIETY invertebrates and the vertebrates in the degrees of kinship possessed by groupmates. Hamilton was the first to point out that the haplodiploid mode of sex determination in the Hymenoptera (males from unfertilized, haploid eggs; females from fertilized, diploid eggs) results in females being more closely related to their sisters than to their own offspring.

Entomol. 3:659-63. 23 JOHN J. MCKELVEY, JR. M. 1944. A low density of tsetse flies associated with a high incidence of sleeping sickness. Bull. Entomol. Res. 35:51. National Academy of Sciences, Committee on the African Honey­ bee. 1972. Final report. Washington. F. Man's mastery of malaria. 1955. Oxford University Press, London. University of California Food Task Force. 1974. A hungry world: the challenge to agriculture. Summary report. College of Agriculture, Division of Agricultural Sciences.

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