1964] 
Wilson and Taylor — Fossil Ant Colony 
95 
O. LEAKEY I 
MIOCENE 
1.00 1.25 1.50 1.75 2.00 2.50 
MAXIMUM HEAD WIDTH 
Figure 2. 0. leakeyi 
Figures 1-2. The comparison of worker polymorphism in the Miocene 
Oecophylla leakeyi with that in the living O. smaragdina. In Figure 1 (oppo- 
site page), the size frequency curve of a large random sample from a single 
colony of O. smaragdina from Assam is given in head width units plotted 
logarithmically. The mesosomas and petioles of selected minor and major 
workers are also shown, as well as the double logarithmic plot of the scape 
length against head width. (Modified from Wilson, 1953). In figure 2 (above) 
similar data from the fossil leakeyi colony are given in scale with Figure 1. 
Pupal worker head widths are used but are closely comparable to adult worker 
head widths. Scape length could not be measured in this material. A, head 
of holotype major worker (imaginal), B, mesosoma and petiole of a major 
worker (imaginal), C, head of a minor worker (pupal), D, mesosoma and 
petiole of a minor worker (imaginal). 
