Figure 1 in Larval instars of the ant Strumigenys solifontis Brown (Hymenoptera: Formicidae): the fallacy of size distribution

Figure 1. Head widths of Strumigenys solifontis larvae. The x-axis is represented by divisions of the ocular micrometre used. (a) Head widths of 215 larvae examined at 250× magnification (1 division = 7.3 µm). The three peaks correspond to the second, third and fourth instars. (b) Head widths of 8 first-instar larvae that were found attached to the egg pile. They have practically no long setae and are clearly distinguished from the second instar (see Figure 4). (c) Head widths of 161 larvae examined at 160× (1 division = 10.0 µm).