Even in England, Barnes has known women of feeble sexual constitution who menstruated only in summer (R. Barnes, Diseases of Women, 1878, p. 192).
A. B. Holder, "Gynecic Notes among American Indians," American Journal of Obstetrics, No. 6, 1892.
In the male, the phenomenon is termed rut, and is most familiar in the stag. I quote from Marshall and Jolly some remarks on the infrequency of rut: "'The male wild Cat,' Mr. Cocks informs us, (like the stag), 'has a rutting season, calls loudly, almost day and night, making far more noise than the female.' This information is of interest, inasmuch as the males of most carnivores, although they undoubtedly show signs of increased sexual activity at some times more than at others, are not known to have anything of the nature of a regularly recurrent rutting season. Nothing of the kind is known in the Dog, nor, so far as we are aware, in the males of the domestic Cat, or the Ferret, all of which seem to be capable of copulation at any time of the year. On the other hand, the males of Seals appear to have a rutting season at the same time as the sexual season of the female." (Marshall and Jolly, "Contributions to the Physiology of Mammalian Reproduction," Philosophical Transactions, 1905, B. 198.)
A. Wiltshire, British Medical Journal, March, 1883. The best account of heat known to me is contained in Ellenberger's Vergleichende Physiologie der Haussaügethiere, 1892, Band 4, Theil 2, pp. 276-284.