Fig. 2 in Early ant trajectories: spatial behaviour before behaviourism

Fig. 2 Early ant trajectories as recorded by Victor Cornetz and Felix Santschi. a The classic mirror experiment performed during the homebound runs of two ants. The dashed parts of the ants' trajectories correspond to the times when the sun shade and the mirror (M) were put in place. N nest, S sun (Santschi 1911). b Record of a round- trip foraging journey (Cornetz 1910b). c Homeward paths recorded at or after sunset. In each case the slowly walk- ing ant was surrounded by a cardboard cylinder, which was either open-topped (open circles) or covered by an opaque screen (filled circles) (Santschi 1923b) [Figures adapted from a Santschi (1911, Fig. 4), b Cornetz (1910b, Fig. 77), c Santschi (1923b, Fig. 2)]