21. Their eyes are relatively small and their antennal scapes are half as long as their heads. 22. Some evidence of early evolutionary history is the structure of the antennal heart, a separate antennae. 23. In the Chrysopsinae, the antennal flagellum has a basal plate and the flagellum has four annuli. 24. The local neurons, which are primarily inhibitory, have their neurites restricted to the antennal lobe. 25. The space between its compound eyes is about a third of the distance between its antennal sockets. 26. It lacks hinaria on its eighth antennal segment as well as sclerotised spurs on its hind tibia. 27. The first antennal segment is quite bulbous and has a strong sub-apical notch in the female. 28. They have three part to their antennal receptors : odorant receptors, gustatory receptors, and ionotropic receptors. 29. The nymphs have a flattened, pentagonal-shaped head, a long first antennal segment and long legs. 30. The epistome is effectively the sternite of the antennal segment, and lies between the base of the labrum.
