. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Social Biology of Miscuocyttarvs drewsenj • Jeanne 123 120 r. Figure 20. Nest growth, colony 310. A. Nest size in nunnber of cells. L = date first larva eclosed. P :=: date first larva spun its cocoon. W = date of emergence of first adult female. M =: dote of emergence of first adult male. 8. Number of empty cells. initiation (Table 19 and Figs. 38-41). As these matured they began to assume \\orker duties. By this time there was an increase in the number of larvae, as the eggs laid at the beginning of the pupal period
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Social Biology of Miscuocyttarvs drewsenj • Jeanne 123 120 r. Figure 20. Nest growth, colony 310. A. Nest size in nunnber of cells. L = date first larva eclosed. P :=: date first larva spun its cocoon. W = date of emergence of first adult female. M =: dote of emergence of first adult male. 8. Number of empty cells. initiation (Table 19 and Figs. 38-41). As these matured they began to assume \\orker duties. By this time there was an increase in the number of larvae, as the eggs laid at the beginning of the pupal period began to hatch. With the increase in the number of workers, the rate of nest growth increased (Figs. IS, 19) and the duration of the lanal stage began to de- crease (Figs. 12B, 13B, 14B). Tlie reason for the gradual decrease is clear: larvae that eclosed early {, just after those comprising tlie first pulse) had proportion- ately more of their time on the nest before workers emerged and when rate of feeding was slow. Larvae eclosing later spent a greater proportion of their time as larvae when workers were present and feeding was faster. e. Emergence of males and The first males began to emerge approxi- mately six weeks after the first larvae pupated (Table 19; Figs. 19, 20, 21). At about this time nonworkers also began to make their appearance. On some nests several nonworkers appeared among the first workers, but these were always in- dividuals who stayed on the nest only one or two days and could well have become \\'orkers but for an early disappearance. There was only one exception: no. 9 on colony 310 emerged 10 days before the first male, and stayed on the nest 10 days without being seen to perform worker tasks. As males and nonworkers appeared and had to be fed by the workers, the rate of nest growth decreased. Tliis was seen in colonies 268, 310, and 342 (Figs. 19, 20, 21). Morimoto (1954a) reported that with the appearance of males, nest growth sto
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