Whorl: a ring of long hair arranged around a centre, like the spokes around the hub of a wheel.
Wing, Wings: membranous reticulated organs of flight; one pair, the primaries, attached to the meso-thorax; the other, the secondaries, attached to the meta-thorax.
Wing covers: those parts of the chitinous cuticle of larvae, nymphs or pupae which cover the rudiments of the wings of the imago: the forewings of an imago when they are thicker than the hind wings and cover them when at rest: see elytra; tegmina.
Wings of the heart: the series of diagonal and other muscular fibres above the diaphragm in the pericardial cavity: see pericardial diaphragm.
Wing cells: areas inclosed by veins: reference should be had to the figures illustrating venation and to the special terms applied to the cells.
Winglets: small, concavo-convex scales, generally fringed at tip, under the base of the elytra in Dytiscidae.
Wing-pads: undeveloped wings of pupa or nymph.
Wing-scale: in Hymenoptera, = tegula; q.v.
Workers: the undeveloped females in the social Hymenoptera; also those sexually undeveloped Termites that are not soldiers.