Smerinthus jankowskii Oberthür, 1880, Etud. ent. 5: 26. Type locality: [Russia, Primorskiy Krai,] Askold Island.
Synonym. Smerinthus jankowskii Oberthür, 1880.
Synonym. Marumba jankovskii Kuznetsova, 1906.
Synonym. Marumba jankowskii bergmani Bryk, 1946.
Wingspan: 68--80mm. Similar to Marumba maackii, but hindwing upperside costal and distal areas not yellow. In the male genitalia, uncus broader in middle than in M. maackii, with the medial division less deep, the lobes notched laterally, with a tooth proximally on the notch, nearly as in M. sperchius. Gnathos nearly as broad as in M. maackii, suddenly narrowed to a short hook the sides sometimes sharply angled. Valva as in M. maackii, the dorso-apical lobe rather more pointed; processes of subdorsal basal fold similar to M. maackii, but slightly more slender. Harpe shorter than in M. maackii. In the female genitalia, sterigma anterior part triangular, thickened before ostium bursae, with a small smooth, medial tubercle proximal to thickened ridge.
In the Russian Far East, a lowland species of mixed and pure deciduous woodland characterized by Quercus mongolica (Izerskiy, 1999b).
China: 28.vi-vii (Nei Mongol; Heilongjiang). North Korea: 15-29.v (North Pyongan Province); 1-12.vii (North Pyongan Province). Japan: 1.vi-18.vii (Hokkaido); 3.vi-7.vii (Honshu); 23.vii-10.viii (Hokkaido); 26.viii (Honshu). Russia: 28.v-23.vi (Primorskiy Krai); 29.v-6.vii (Khabarovskiy Krai); 12-18.vii (Primorskiy Krai); 16.vii (Khabarovskiy Krai); 10-24.viii (Primorskiy Krai).
Park et al. (1999) give early June until late August as the flight period in Korea.
Larval hostplants. Recorded in 'Manchuria' on Tilia (Oberthür, 1886), such as Tilia amurensis, which is the same host utilized in South Korea (Vyacheslav Ivonin, pers. comm. 2022). Chu & Wang (1980) also listed Ficus religiosa and Ziziphus mauritiana, but these are certainly erroneous. Records for Japan (Sugi, 1987) and Primorskiy Krai (Graeser, 1888; Derzhavets, 1984) are restricted to species of Tilia, such as Tilia mandshurica (Izerskiy, 1999b) and Tilia amurensis.
China: Nei Mongol (Zalantun/Butha Qi; Chifeng/Ulanhad, Daguangdingzishan, 2061m); Heilongjiang (Yichun); Liaoning (Changhai, Dachangshan Island).
North Korea: Kyonggi Province (Gaeseong/Kaesong); North Hamgyong Province (Jueul); North Pyongan Province (Chonma County, Chonma-san).
South Korea: Kyonggi Province (Yongmun-san; Asan Bay; Suwan; Gwangleung); Kangwon Province (Seolak-san; Odae-san; Sogumgang; Jodong-ri; Chiak-san; Baekduk-san; Taebek-san; Bongmyung-ri; Gyebang-san; Jeombong-san; Jungseon; Pyeongchang); North Cholla (Mujugucheondong; Daedun-san; Jiri-san; Namwon); South Cholla Province (Baekyang Temple; Gurye); North Kyongsang Province (Sobaek-san; Mungyungsaejae; Juwang-san; Seongju); South Kyongsang Province (Geoje-do; Namhae; Sancheong; Tongyoung; Hadong; Hamyang); Cheju Province (Cheju-do; Gwaneum Temple; Topyung; Sungpanak; Ipseok-dong; Andeok; Donnaeko).
Japan: Hokkaido (Kushiro; Tokachi; nr Sapporo; Sounkyo); Honshu (Kirizumi Spa, 1080m; Karuizawa; Kisojihara, 1200m; Nakanoyu Spa; Norikura Kogen, 1500m; Shinbo; Ohnogawa Azumimura, 1000m; Hinoemata; Fujinomiya; Tanzawa; Sagashio Yamato; Akiyamago Tsunan-cho); Shikoku; Kyushu.
Russia: Amurskaya (Uril area; Blagoveshchensk); Yevreyskaya (Bastak); Khabarovskiy Krai (Khabarovsk; Bolshekhekhtsyrskii Nature Reserve, Khabarovsk suburbs; Malmyzh (on the Amur River)); Primorskiy Krai (Askold Island; Jankowski Peninsula; Vladivostok; Barabash; Khasan; Kedrovaya Pad Nature Reserve; Primor'e; Anisimovka).
Southeastern Russian Far East, northeastern China, North Korea, South Korea and all major Japanese islands.
Holarctic; eastern Palaearctic region. Pleistocene refuge: Monocentric -- Manchurian refuge.