Diacra convexa Emeljanov, 1961

Tishechkin, D. Yu., 2024, New data on the male calling signals of Palearctic Deltocephalinae (Homoptera: Cicadellidae), Russian Entomological Journal 33 (1), pp. 9-21 : 13

13. Diacra convexa Emeljanov, 1961

Figs 53–58 .

MATERIAL. Southeastern Kazakhstan, rocky desert between the Ili River and the lower Charyn River, about 4 km west of the Charyn River, 43.720° N, 79.324° E, from Nanophyton iliense U.P. Pratov , together with the previous species, 14. VI .2022, signals of two males recorded at 24 ° C .

SIGNALS. The male calling signal is a phrase lasting for 3.8– 6.3 s and consisting of two parts with a syllable repetition period about 40–100 ms and 18–20 ms, respectively ( Figs 53–58 ). Often in the end of the first part of the phrase, the pulse amplitude decreases and their repetition period increases and becomes very variable ( Figs 53–54, 56 ).

Figures

Figs 50–63. Oscillograms of male calling signals of Deltocephalinae. 50–52 — Achaetica anabasidis; 53–58 — Diacra convexa; 59–63 — Rhoananus hypochlorus. Faster oscillograms of the parts of signals indicated as “52”, “56–58”, and “61–63” are given under the same numbers. Рис. 50–63. Осциллограммы приЗывных сигналов самцов Deltocephalinae. 50–52 — Achaetica anabasidis; 53–58 — Diacra convexa; 59–63 — Rhoananus hypochlorus. Фрагменты сигналов, помеченные цифрами “52”, “56–58” и “61–63”, представлены при большей скорости раЗвёртки на осциллограммах под соответствующими номерами.