Fig. 1. Trichoid hair types present on the dorsal surfaces of the forewings of Schistocerca gregaria. (A) Distribution of hair lengths measured from SEMs. Grey boxes highlight the trimodal nature of the distribution. (B) Short hair with socket (arrowhead). (C) Enlargement of the pore at the tip of the shaft of the short hair shown in B (arrowhead). (D) Medium length hair with socket but no pore. (E) Medium length hairs on the subcosta vein point towards the leading and trailing edges at irregular intervals. The trailing edge is up, distal is to the right. (F) Long hair on the postcubitus vein, with socket but no pore. (G) A variety of hair-like structures on a wing vein (black arrowhead) and on the wing membrane (white arrowhead) of the hindwing anal region. (H) The shorter hair-like structures on the hindwings are variable in length and do not insert into a socket. (I) Longer hair-like structures on the proximal 10–15 mm of a forewing, near the wing's articulation with the thorax. (J) Enlargement of the long hair-like structures near a forewing's articulation. These longer structures do not have a socket (arrowheads) or a pore at the tip.