Bioacoustics of Macropsis (Macropsis) elaeagni

Remarks. M. cyanescens was described from Ferghana Valley and foothills in its South-Western part. According to the original description ( Dubovskiy, 1966 ), it differs from closely related M. elaeagni by longer penis with elongate apex, styles expanded in preapical part, and rather long pygofer processes (Figs. 62–63, M. elaeagni sensu Dubovskiy, 1966 and 64–65, M. cyanescens sensu Dubovskiy, 1966 ). We failed to find differences in pygofer process length between samples of specimens from different localities in Central Asia. Males with a more or less expanded preapical part of the styles were found almost in every population along with typical M. elaeagni (e.g. Figs. 72–75, males from Kara-Bulak, South Kyrgyzstan or 78–79, males from Ferghana Mtn. Range, 15 km North- East of Bazar-Korgon). Males with different penis shape also can be found in every sufficiently large sample from Southern Kyrgyzstan (Figs. 67–71). In addition, occasionally the combination of expanded styles (as in M. cyanescens ) and rather short penis (as in M. elaeagni sensu Dubovskiy, 1966 ) can be found in the same male (Figs. 76–77). 2nd abdominal apodemes in all males have the shape characteristic of M. elaeagni (Fig. 66) irrespective of genitalia shape. Also, in calling signal pattern all males investigated fall into M. elaeagni . On this basis we establish the synonymy of M. cyanescens Dubovskiy, 1966 under M. elaeagni Emelyanov, 1964 .

Diagnosis . Differs from poplar- and willow-feeding Macropsis species by narrow penis in side view. Differs from other Palaearctic Macropsis species by pale greenish coloration and unmarked head, pro- and mesonotum. Superficially similar to M. elaeagnicola Dubovskiy, 1966 , but differs from it by short and wide 2nd abdominal apodemes (longer and narrower in M. elaeagnicola , Figs. 80–84), blunted style tips (elongated and pointed in M. elaeagnicola , Figs. 87–88), larger size (♂, 3.0– 3.3 mm ; ♀, 3.6–3.9 mm in M. elaeagnicola ), and calling signal pattern. Host. Elaeagnus spp. Calling signal. Signal is a succession of repeated syllables lasting for about 1- 1.5 s each ( Figs. 89–94 ). Typically, each syllable includes a train of pulses followed by several discrete ones ( Figs. 95–104 ). Both shape and duration of syllables can vary even within the same signal ( Figs. 90, 96–97 ) or in the males from the same sample ( Figs. 91, 98–100 ). Signals of males resembling M. cyanescens in genitalia traits do not differ from the signals of typical M. elaeagni .