Bioacoustics of Megapomponia

1. Body comparatively small (body length 53.0– 59.5 mm ); forewing without infuscation on mediocubital (m-cu) crossvein............................. 2 Body very large (body length 60–75 mm ); forewing with distinct infuscation on mediocubital crossvein.................................................. 3 2. Mesonotum mostly dark brown to fuscous without prominent marks; forewing with slightly smoky distal regions along eight apical cells........ M. castanea Mesonotum reddish brown with black spots; forewing without smoky area along hind margin................................... M. macilenta sp. nov. 3. Pronotal collar with at least two pairs of blackish spots laterally........... 4 Pronotal collar without spots............................................ 9 4. Central mesonotum with a trident-shaped mark; basal membrane of forewing reddish orange.......................................................... 5 Central mesonotum with a transverse series of spots; basal membrane of forewing brown, not reddish orange...................................... 8 5. Male body length longer than 70mm , wing span usually more than 200mm ; male operculum almost one colour, ochraceous; male abdominal tergites and sternites without distinct black marks....................... M. imperatoria Male body length 60–70mm , wing span about 160–180mm ; male operculum with broad smoky areas; male abdominal tergites and sternites with a broad black portion........................................................... 6 6. Submedian sigilla of mesonotum with a black spot on anterior margin; male abdominal sternites distinctly with a broad black transverse band along posterior margin of each segment........................................ 7 Submedian sigilla of mesonotum without black spots on anterior margin; male abdominal sternites largely fuscous......................... M. atrotunicata 7. Male wing span about 175mm ; postclypeus moderately swollen; spot on lateral sigilla of mesonotum widely separated from lateral spot of mesonotum................................................. M. intermedia Male wing span about 160mm ; postclypeus considerably swollen; spot on lateral sigilla of mesonotum nearly touching lateral spot of mesonotum................................................... M. foksnodi 8. Primarily active in January and February; calling song high-pitched and consisting of repeated phrases each comprising a long echeme followed by many fragmental echemes........................................ M. pendleburyi Primarily active in November and December; calling song comparatively low-pitched and consisting of repeated phrases each comprising varieties of fragmental echemes...................................... M. clamorigravis 9. Mesonotum without lateral spots; basal membrane of forewing dark brown to fuscous; male operculum largely or entirely fuscous.............. M. merula Mesonotum with a pair of small lateral spots; basal membrane of forewing reddish orange; male operculum mostly ochraceous................ M. sitesi