Leafhoppers of the genus Kybos Fieber, 1866 (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini) in Kyrgyzstan Author Tishechkin, Dmitri Yu. text Zootaxa 2024 2024-08-16 5496 1 89 100 http://dx.doi.org/10.11646/zootaxa.5496.1.4 journal article 10.11646/zootaxa.5496.1.4 1175-5326 13330988 24953EBD-C29F-4C0B-9CA5-C39F94938047 Kybos niveicolor Zachvatkin, 1953 Figs 9 , 33 , 42–43, 51, 54, 60, 74–76 Kybos niveicolor Zachvatkin, 1953: 239 Empoasca ( Kybos ) niveicolor niveicolor Dworakowska, 1976: 440 Description. Live specimens white or greenish white, dry ones yellowish white, sometimes with slight greenish tinge ( Fig. 9 ). Dorsal apodemes short, ventral apodemes about 1.6–1.7 times as long as wide at base, narrow, parallel-sided, separated by narrow notch ( Fig. 33 ). Genitalia almost same as in K. montanus and K. oshanini . Aedeagus without lateral processes (Figs 42–43). Style with numerous long setae and serrated falcate apical part (Fig. 51). Pygofer appendages narrow (Fig. 54). Anal collar appendages narrow, falcate (Fig. 60). Hosts. Populus alba . P. nivea and P. bolleana , listed as food plants in the original description ( Zachvatkin, 1953b ), are now considered synonyms of P. alba ( Skvortsov, 1972 ) . Calling signal. Signals of five males from Kyrgyzstan ( Arkyt Village , Chatkal Range , West Tien Shan , on P. alba , 16. VII. 2011 , recording at 22 oC ) were investigated . Calling signal is generally the same as in K. oshanini and K. montanus . It consists of 3–6 high-amplitude pulses, following each other with a period of 320–520 ms; sometimes, the pulse repetition period increases towards the end of a signal ( Figs 74–75 ). Pulse duration averages 30–45 ms ( Fig. 76 ). Unlike two above-mentioned species, in K. niveicolor , additional low-amplitude pulses are absent between the main high-amplitude ones. As a result, the signal is not a phrase, i.e. a sequence of syllables, but a simple pulse sequence. FIGURES 13–37. Kybos spp. , abdominal apodemes. 13–16— K. montanus (13–14—dorsal apodemes, 15–16—ventral apodemes); 17–32— K. oshanini (17–24—dorsal apodemes, 25–32—ventral apodemes; 17–20, 25–28—specimens from Shekaftar, the northern edge of the Fergana Valley, 21–22, 29–30—specimens from the same locality in West Tien Shan, 23, 31—specimen from the Ili River basin, Kazakhstan, 24, 32—specimen from the type locality of K. oshanini in Moscow Oblast); 33— K. niveicolor , dorsal and ventral apodemes; 34–35— K. auricillatus (34—dorsal apodemes, 35—ventral apodemes); 36— K. populi , dorsal and ventral apodemes; 37— K. virgator , same. Distribution. Widespread in southern and southeastern Kazakhstan , Kyrgyzstan , Uzbekistan , and Tajikistan ; also, was found in Xinjian, China ( Mitjaev, 2002 ).