Figure 4 in Larval instars of the ant Strumigenys solifontis Brown (Hymenoptera: Formicidae): the fallacy of size distribution

Figure 4. Four larval instars of Strumigenys solifontis observed in transmitted illumination. (a) First larval instar. The outer integument was separated from the interior tissue due to the latter's shrinkage by fixation in ethanol. Scale bar 200 µm. (b) First larval instar (above) and second larval instar (below). Scale bar 200 µm. (c) Second larval instar (left) and third larval instar (right). The arrowhead points to the shed exuviae of the previous instar. Scale bar 300 µm. (d) Fourth larval instar. Three different types of setae, unbranched, bifid and anchor-tipped, are indicated by arrowheads a, b and c, respectively. Scale bar 300 µm.