STRUCTURE OF THE SUBGENUAL ORGAN IN THE GREEN LACEWING, CHRYSOPERLA-CARNEA

REM and TEM studies of the subgenual organ in Chrysoperla carnea (Neur optera: Chrysopidae) show that it is composed of three scolopidia, eac h with one sensory, one scolopale and one cap cell. The distal part of the dendrite shows a cilium with a '9 + 0' structure. The cross-bandi ng pattern of the ciliary root has a periodicity of bands of about 61 nm. The scolopale material in a certain part of the scolopale cell is organized into five rods. The cell bodies of all three cap cells form a lens-like structure, the velum, which is fixed to the leg wall and t he trachea with an extracellular material. The importance of the velum is discussed. Four types of intercellular junction are found;spot des mosomes, belt desmosomes, septate junctions and gap junctions.