Sesia yezoensis (Hampson, 1919)

Gorbunov, O. G., 2022, New data on clearwing moths (Lepidoptera: Sesiidae) of Sakhalin Island, Far Eastern Entomologist 449, pp. 21-28 : 24-26

Sesia yezoensis (Hampson, 1919)

Figs 6–11

MATERIAL EXAMINED. Sakhalin: Nevelsky District, Yasnomorka River , 46˚44.443΄N ,

141˚56.752΄E, 16 m, 24.VII 2021, 4♂, Gorbunov leg. ( Sesiidae pictures Nos 0495-0496–

2021); same locality, 25.VII 2021, 4♂, Gorbunov leg.; Nevelsky District , Yasnomorskoye ,

46˚44.967΄N, 141˚54.905΄E, 13 m, 26.VII 2021, 8♂, Gorbunov leg. ( Sesiidae pictures Nos

0487-0488–2021); Nevelsky District, Yasnomorka River, 46˚44.611΄N, 141˚55.810΄E, 24 m,

26.VII 2021, 4♂, Gorbunov leg. ( Sesiidae pictures Nos 0489-0490–2021, 0493-0494–2021);

same locality, 27.VII 2021, 9♂, Gorbunov leg. ( Sesiidae pictures Nos 0491-0492–2021) ;

Nevelsky District , Yasnomorka River, 46˚44.778΄N, 141˚56.104΄E, 54 m, 28.VII 2021, 5♂ ,

Gorbunov leg. ( Sesiidae pictures Nos 0497-0502–2021); Nevelsky District, Yasnomorka

River, 46˚44.611΄N, 141˚55.810΄E, 24 m, 29.VII 2021, 5♂, Gorbunov leg. ( Sesiidae pictures

Nos 0503-0508–2021); Yuzhno-Sakhalinsk, Airport, 46˚53.207΄N, 142˚43.630΄E, 22 m, 30.VII

2021, 1 exuvium, Gorbunov leg.

DISTRIBUTION. In the Eastern Palearctic, from the Trans-Baikal Territory in the west to the South Kuriles in the east, and from the Khabarovsk Territory and South Sakhalin in the north to South Korea and Honshu in the south. Previously, it was known only from

Yuzhno-Sakhalinsk and Novoaleksandrovsk (Gorbunov & Tshistjakov, 1995).

HOST PLANTS. The larvae live in the lower parts of the trunks and in the upper parts of the large roots of Salix udensis Trautv. et C.A. Mey. and some other tree willows, and,

sometimes, Pupulus spp. ( Salicaceae ). S. udensis is the only host plant on the Yasnomorka

River valley.

0498–2021. Alar expanse 41.0 mm; 8, 9 – Sesiidae picture Nos 0505-0506–2021. Alar expanse

45.6 mm; 6, 8 – dorsal view; 7, 9 – ventral view.

I also found an exuvium of Sesia yezoensis at the base of the trunk of Populus sp. near

Yuzhno-Sakhalinsk International Airport ( Fig. 11 ).

SEXUAL ACTIVITY. Males responded very actively to the pheromone lure for Sesia apiformis from about 9 am to 4 pm ( Fig. 10 ). This is the time when the valley of the Yasnomorka River was well lit by the sun. In total, about a hundred males were attracted, of which only 39 were caught.

Figures

Figs 6–9. Males of Sesia yezoensis (Hampson, 1919). 6, 7 – Sesiidae picture Nos 0497-

Figs 10–11. Sesia yezoensis (Hampson, 1919). 10 – males attacking a pheromone lure. 29.VII 2021; 11 – an exuvium at the base of the trunk of Populus sp. near Yuzhno-Sakhalinsk International Airport. 30.VII 2021.