PLATE 1.24. QUEEN FOREWING SURFACE

TOP LEFT Dorsal surface of the forewing showing a dense population of short, slender, socketed hairs that may be mechanoreceptors that provide aerodynamic sense, that is, monitor the vector and magnitude of air currents over the wing surface. (x 550)

TOP RIGHT. Higher magnification of a single hair, revealing an oval rather than round socket. Presumably the hair's flexion is confined to the long axis of the oval so it can record wind in one axis only. (x 3,300)

.MIDDLE. Ventral surface of the forewing. The setae are less dense than on the dorsal surface. If innervated, some unsocketed hairs may be chemoreceptors. (x 510)

BOTTOM LEFT. Three unsocketed setae on the ventral side of the forewing. (x 1,100)

BOTTOM RIGHT. Socketed seta on the ventral side of the forewing vein. The tip can not be resolved well, but its bulbous nature suggests a terminal pore. If so, this hair is probably a chemoreceptor. (x 5,500)