PLATE 1.20. QUEEN WING BASE MEMBRANES

TOP LEFT Forewing base and stub of the hind wing (center right of //I(, field Interesting lateral membranous areas in the middle of the field (arrows) are in higher magnification in the other three micrographs of this plate (see also Plates 1.18, 1.19, 1.21, and 1.22). (x 55)

BOTTOM LEFT Rosettelike cuticular spines at the wing base arrayed in rows with high-relief, cuticular sculpturing between these spine clusters (left arrow hi top left micrograph (x 23,400)

TOP RIGHT Pleural surface beneath the hind wing base (right arrow in top left micrograph). Acutely tipped spines rise from a surface covered with small cuticular knobs. (x 2,200)

BOTTOM RIGHT Pleural membrane at the base of the forewing (center arrow in top left micrograph) Elsewhere on the body cuticular sculpturing is characterized by more prominent (than in the top right micrograph), short, stout spines in furrows between rows of taller spines. The cuticular surface is covered with a series of low-lying ridges. ( x 23,800)