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Psyche 
Fig. 2. The quantity of egg yolk per subcaste member is shown as a function of 
the amount of egg yolk in the colony. Underlined groups do not differ significantly at 
the p = 0.05 level using the Newman-Keul Multiple Range Test. 
collected per subcaste and enables us to compare feeding efficiency 
as if all of the colonies had collected the same amount of food. 
Larvae held with nurses or reserves received significantly more food 
than larvae tended by foragers alone. Larvae held with nurses and 
either reserves or foragers received significantly more food than 
larvae tended by foragers and reserves. Larvae in F/N/R combina- 
tions received as much or more food than larvae tended by other 
subcaste combinations. Queens received significantly more food 
when tended by foragers alone than by either reserves or nurses. 
F/N groups fed their queens significantly more food than either the 
R/N or F/R worker combinations. Overall, queens tended by 
foragers or foragers and nurses received significantly more food 
