Oncopsis burjatica Tishetshkin 2008

20. Oncopsis burjatica Tishetshkin, 2008

Figs. 52–56, 198–225

Description. Coloration of males typical (Figs. 52–53), females from East Siberia similar to males or brown (Fig. 54). Females from Far East greenish yellow with brownish apical two-thirds of forewings or bright yellow with transparent apical half of forewings (Figs. 55–56).

In shape of male genitalia indistinguishable from O. flavicollis, O. carpini, and O. tsejensis (Figs. 202–210, 218–219, 221–223, 225). In shape of the 2nd tergal apodemes differs from O. flavicollis, but sometimes similar to O. carpini and O. tsejensis (Figs. 211–217, 220, 224). We have not found any significant morphological differences between populations from East Siberia (Figs. 202–217), Kazakhstan (Figs. 218–220), and the Far East (Figs. 221– 225).

Body length (including tegmina): ♂, 4.2–5.1 mm; ♀, 4.4–5.6 mm.

Allopatric with all other species from O. flavicollis species group; the only species of this group occurring in Eastern half of Palaearctic.

Host. Betula pendula in East Siberia, B. platyphylla on Sakhalin, B. platyphylla var. japonica in Japan (Okudera, 2014).

Distribution. Central and Eastern Kazakhstan; Russia: East Siberia, the Russian Far East including Sakhalin; Japan: Hokkaido, Honshu, Shikoku (Okudera, 2014).

Remark. Comparison of calling signals of males from East Siberia (type locality: Buryatia, Irkut River Valley, environs of Mondy Village, recording at 24o C; Figs. 198, 200) and from Southern Sakhalin (environs of Sokol Town, recording at 23o C; Figs. 199, 201) supports the conspecificity of specimens from Siberia and the Far East.