Behaviour in the food convergence tests showed mean SD rejection rates of 14.81 6.83% for nestmates and 94.44 13.36% for non-nestmates that were fed their own colony’s food. The subsequent tests showed no variation in rejection rates when workers were fed a common artificial diet (first week: nestmates 16.67 6.25% versus non-nestmates 96.30 18.47%; second week: nestmates 14.81 4.68% versus non-nestmates 98.15 1.85%; third week: nestmates 16.83 4.60% versus non-nestmates 100%; fourth week: nestmates 7.41 5.49% versus non-nestmates 98.15 1.85%).
In this test, for all the sessions, nestmates differed statistically from non-nestmates in hydrocarbon composition. The values of the discriminant analysis are described in Table 1. The mean correct classification of individuals to their colony of origin was 97.52%, while in a randomclassification for two groups it would be expected to be 50%.