54 
Psyche 
[Vol. 95 
Figure 1 . Pattern of inequality in distance traveled by individual larvae in sibling 
groups. Numbers adjacent to curves indicate the instar tested. Groups A, B, C and D 
are shown. First instar larvae of Group D were tested, but they remained aggregated 
and thus are not shown. 
cients in Table 3 were significant). 3) In a quarter of the tests, ranks 
of individual larvae from one instar to the next remained consistent. 
This was primarily between the third and fourth instars (for 3 of 4 
comparisons). 
The Lorenz curves and Gini coefficients showed that the patterns 
of distance traveled by individuals changed over instars. In many 
cases, especially in the early instars, a few individuals moved great 
distances whereas others hardly moved. By the later instars, varia- 
tion was still large but the inequalities (or skewness) among individ- 
uals were much less. 
