Process of pollination. A long-horned bee Eucera longicornis attempts to mate with an Ophrys scolo- pax orchid. The orchid flower imitates in shape, colour and smell, the female long-horned bee. Male bees are sexually attracted to the flower & mount it. In the process of bee movements, the head of Eucera brushes against pollen bearing pollinaria" of the flower & these are released onto the bee's head. The bee carries these yellow pollen structures to another orchid plant and acts as pollinator. Orchid-bee attraction occurs at a time when female Eucera bees are not yet born, and the male has no choice but to visit the Ophrys orchid."