FIGURE 7 in Description of a new species of the genus Hyalessa China (Hemiptera: Cicadidae: Sonatini) from Yunnan, China, with a key to the species of Hyalessa and a calling song analysis for two Hyalessa species

FIGURE 7. Hyalessa fuscata (Distant, 1905). Calling song. A, Power frequency spectrum with overlay of 175 spectra computed in the middle of the signal showing dominant frequencies marked by F1, F2, F3, and F4, spectrogram and oscillogram (from top to bottom) of a sequence with the four parts of the calling song. B, Detailed oscillogram of the end of A showing two phrases. C, Detailed spectrogram and oscillogram of a part of B showing three of the two different echemes type with their amplitude variation. Daehwa-dong, Goyang-city, Gyeonggi-do Province, South Korea, 26°C.