SEM images of 3rd valvulae of Habrobracon hebetor a the terebra is partially embraced by the 3rd valvulae b inner proximal surface of the 3rd valvulae with fine trichomes distally c outer surface of the 3rd valvulae, proximally exhibiting annulation caused by fine transverse furrows (arrow) d outer surface of the 3rd valvulae at the transition zone (arrow) between the distal longitudinal ridge to the proximal vertically folded surface at the region in which the 3rd valvulae expand e inner surface of the apex of a 3rd valvula covered by trichomes. Abbreviations: 3vv = 3rd valvula; trb = terebra; t = trichome.