Nemapogon gerasimovi Zagulajev, 1961

(Figs. 2, 8, 10, 17)

Nemapogon gerasimovi Zagulajev, 1961: 1118 .

Adult (Fig. 2). Wing expanse 9.0–15.0 mm.

Material examined. CHINA: 6 33, 7 ƤƤ, Beijing (39°55΄N, 116°24΄E), parasitizing mushroom, 6 September 1987; 140 33, 149 ƤƤ, Jixian (40°02΄N, 117°24΄E), Tianjin, 2 April to 5 June 2002; 25 33, 23 ƤƤ, Jingyu (42°23΄N, 126°48΄E), Jilin Province, 12 June to 3 July 1997; 1 3, 1 Ƥ, Huoditang, Ningshan (33°19΄N, 108°20΄E), Shaanxi Province, 1620 m, 14 June, 10 July 1987, leg. Houhun Li and 1 Ƥ, 14 July 1990, leg. Jinfu Li; 1 3, Abudula, Tacheng (46°46΄N, 82°59΄E), Xinjiang Uygur Autonomous Region, 5 August 1990, leg. Jinfu Li; 1 3, 3 ƤƤ, Zepu (38°12΄N, 77°15΄E), Xinjiang Uygur Autonomous Region, 2 to16 August 1994, leg. Maimaiti Aisihaer.

Biology: The caterpillars inhabit dead wood and pore fungi and construct portable cases (Fig. 8). The larvae feed on dried fruits in houses and attack stale products in food stores (Zagulajev, 1964). They were found infesting mushrooms in Tianjin and Beijing and ice-mushrooms in Jilin province in our study.

Distribution: China (Beijing, Tianjin, Jilin, Shaanxi, Xinjiang), Kazakhstan, Russia (Siberia).

Diagnosis: This species is characterized by the forewing having a dark brown transverse band at about 2/ 5, slightly narrowed anteriorly; the valvae subrectangular in distal 2/5, the juxta with two small sclerotized arc-shaped structures ventrally and a subrectangular membranous structure dorsally, and the phallus bifurcated at distal 1/ 3 in the male genitalia (Fig. 10); the sternum VIII somewhat broadly M-shaped basally, and the antrum somewhat cup-shaped in the female genitalia (Fig. 17).