Pollination of Ophrys arachnitiformis (Orchidaceae) by males of Colletes cunicularius (L.) (Hymenoptera, Colletidae) in the Atlantic Pyrenees. The pollination of Ophrys arachnitiformis (Orchidaceae) by patrolling males of the solitary bee Colletes cunicularius (Hymenoptera, Colletidae) was investigated in spring 2006 in southern France. Our observations provide evidence that C. cunicularius males pollinate the flowers of O. arachnitiformis in both “cephalic” and “abdominal” positions, which challenges previous records on the constancy of the position of the pollinator on the Ophrys flowers during “pseudocopulations”. Furthermore, these observations may account for the occasional formation of hybrids between sympatric Ophrys species sharing a pollinator but for which the position of the insect on the flowers differs during pseudocopulations.