Phlepsius ornatus, (Perris, 1857)

Tishechkin, D. Yu., 2024, New data on the male calling signals of Palearctic Deltocephalinae (Homoptera: Cicadellidae), Russian Entomological Journal 33 (1), pp. 9-21 : 17

16. P. ornatus (Perris, 1857)

Figs 69–72 .

MATERIAL. Kyrgyzstan, Western Tien Shan Mts. , Torkent Village on the northern shore of the Toktogul Reservoir, the bank of the Torkent River, 41.841° N, 73.161° E, 11.VII.2023, signals of two males recorded at 25 °C .

SIGNALS. The male calling signal is a phrase lasting for 17–20 s and consisting of two parts ( Figs 69–70 ). The first part has a duration of about 7 s. It consists of several syllables, each beginning with a sequence of low-amplitude pulses partially merged with each other and following with a period of 8–9 ms, and ending with one or two high-amplitude pulses ( Fig. 71 , the first half of the oscillogram). The second part of a phrase is a sequence of high-amplitude syllables, following with a period of about 0.7 s at the beginning and up to 1.5 s at the end of the sequence ( Figs 71–72 ). At the beginning of the sequence between the main syllables there are sometimes additional short syllables or separate pulses. The pulse repetition period in main syllables averages 45–80 ms.

REMARKS. In contrast to some other leafhopper genera, signals of two studied species of Phlepsius Fieber, 1866 are completely dissimilar in the temporal pattern.

Figures

Figs 64–72. Male calling signals of Deltocephalinae. 64–68 — Phlepsius intricatus; 69–72 — P. ornatus. 64, 67–72 — oscillograms, 65–66 — oscillogram and sonogram of the same signal at the same speeds. Faster oscillograms of the parts of signals indicated as “67–68 and “71–72” are given under the same numbers. Рис. 64–72. ПриЗывные сигналы самцов Deltocephalinae. 64–68 — Phlepsius intricatus; 69–72 — P. ornatus. 64, 67–72 — осциллограммы, 65–66 — осциллограмма и сонограмма одного и того же сигнала при одной скорости раЗвертки. Фрагменты сигналов, помеченные цифрами “67–68 и “71–72”, представлены при большей скорости раЗвёртки на осциллограммах под соответствующими номерами.