Animal Intelligence / The International Scientific Series, Vol. XLIV.

by George John Romanes

[27] Loc. cit. p. 121.

[28] Loc. cit. p. 123.

[29] Origin of Species, 6th ed. p. 218.

[30] Geistesleben der Thiere, pp. 145-9.

[31] Loc. cit.

[32] Loc. cit. p. 337.

[33] Loc. cit. p. 97.

[34] Harvesting Ants and Trap-door Spiders, London, 1873 and Supplement, 1874.

[35] Journal Linn. Soc., vol. vi. p. 29, 1862.

[36] Agricultural Ant of Texas, Philadelphia, 1880.