[71] Chapter Fourteen.
[72] Chapter Ten, pp. 270-271 [English edition].
[73] Introduction, p. 11 [English edition].
[74] "Um dem guten und gerechten Menschen meine triumphierende Sicherheit zu geben." Introduction [p. 10, English edition].
[75] The most important of these studies have been collected in the great work Les Fourmis de la Suisse (Nouveaux mémoires de la Société helvétique des Sciences naturelles, vol. xxvi, Zurich, 1874), and in the admirable series Expériences et remarques pratiques sur les sensations des insectes, published in five parts in the "Rivista di Scienze biologiche," Como, 1900-1901. [Two only of Forel's writings on insects are available in the English language: The Senses of Insects, Methuen, London, 1908; and Ants and some other Insects, Kegan Paul, London, 1904.] But these works form no more than a fraction of the author's studies written on this subject. Dr. Forel recently told me that since the publication in 1874 of the work which has become a classic, he has penned no less than 226 essays upon ants.
[76] Some of these soldier ants function also as butchers, cutting up the prey into small fragments.
[77] Insect Life, Macmillan, London, 1901.
[78] Mutual Aid, Heinemann, London, 1915.
[79] Auguste Forel, Les Fourmis de la Suisse, pp. 261-263.
[80] Op. cit. p. 249.