PLATE 1.25. QUEEN HIND WING SURFACE

TOP LEFT. Dorsal surface of the hind wing. Numerous hairs are evenly spaced over the surface. Wing hooks are visible on the leading edge of the wing. (x 168)

TOP RIGHT Close-up of the wing in the top left micrograph. Socketed hairs arise from the vein and nonsocketed hairs are in the membranous, interveinal area. Veins are often conduits for nerves, so the socketed hairs may be innervated and have a mechanoreceptor function. (x 800)

BOTTOM LEFT. Ventral surface of the hind wing. The sparse, scattered, nonsocketed hairs give the appearance of peg organs (sensiIla basiconica).(x 450)

BOTTOM RIGHT Higher magnification of a hair, which looks like a grooved peg, on the ventral hind wing. Such hairs may be chemoreceptors. The depression or pit (bottom) delimits the base of a hair on the opposite side of the wing. ( x 4,200)