Description of the song of Purana metallica from Thailand and P. latifascia from Borneo (Hemiptera, Cicadidae)

Abstract

Songs of cicadas Purana metallica Duffels & Schouten, 2007 and P. latifascia Duffels & Schouten, 2007 were investigated. The structure of 50 to 95 s long calling song of P. metallica is a complicated but more or less regular sequence of long and short echemes combined with short clicks. The song sequence starts, after some accelerated pairs of short clicks, with a frequency modulated very long echeme of buzzing sound, which becomes interrupted into a series of short echemes and follows with a series of short echemes interrupted by longer pauses and dividing the song into groups of short echemes and later into groups of short echemes and clicks. The high-pitched calling song of P. latifascia consists of long repeated phrases (duration 110 to 150 s). The frequency modulated introductory phrase is followed by 3 to 4 repeating phrases, which start with a frequency constant buzzing sound, pass over into vibrato sequences and end with a frequency modulated pulsating sound.