Hymenoptera

Thursday, January 31, 2013

Hymenoptera is an order of insects comprising the wasps, bees, ants, and sawflies, whose legs and wings are attached to the thorax and are characterized by clearly differentiated head, thorax, and abdomen, and complete metamorphosis. They have two pairs of transparent membranous wings, with the fore wings being stronger than the hind ones; however, the fore and hind wings are joined together by tiny hooks during flight to form a single plane. The oldest species of hymenoptera evolved during the lower Triassic, about 200 millions years ago.