35

1991), and Limulus polyphemus (Saunders, Kessler & Avise 1986). This

diversity has been attributed to the capacity of tropical populations to maintain

large population sizes over a long period of time (David & Capy 1988) and may

be consistent with the large reproductive capacity and population sizes of

tropical bees relative to temperate bees (Winston, Taylor & Otis 1983).