PLATE 3.21. DRONE WING, VENTRAL SURFACE

BOTTOM LEFT. Hind wing, ventral view, at low magnification. Several veins intersect in this field. (x90)

TOP LEFT Ventral view, near the tip of hind wing. Exceedingly small, cuticular spines randomly arise in this area. Some scattered pits are also visible. (x 420)

TOP RIGHT. Forewing tip, ventral view. Numerous scattered small, blunt cuticular spines are found on this surface. The pits represent the bases of the short counterpart spines arising on the reverse surface of this wing. ( x 130)

BOTTOM RIGHT. Higher magnification of the ventral forewing in the top right micrograph. The spine density is 1/900 micro m^2. (x 750)