Fig. 4

Multivariate representations of cockroach and worker cuticular chemical profiles. The first two principle components (PCs, panels a, b) and discriminant functions (DFs, panels c, d) for chemical profiles of workers and cockroaches from Acromyrmex (a, c) and Atta (b, d) colonies. The discriminant analyses were set up to discriminate between colonies. Triangles represent cockroaches and circles workers; colours code for the different colonies