(6) Adela praepilosa Hirowatari, 1997

(Plates I-2, XII-2)

Adela praepilosa Hirowatari, 1997: 282, figs. 5, 6C, 7C, 12, 14 (TL: Japan, Honshu, Nara Pref., Mt. Obakodake; OPU); Hirowatari 2013: 104, fig. 3-07-9,10 (Japan); Umetsu 2014: 5, fig. 4 (Japan, Akita Prefecture).

Adela nobilis Christoph, 1882 [misidentification]: Matsumura 1931: 1110; Matsumura 1932: 127, pl. 4, fig. 24; Issiki 1957: 12, pl. 1, fig. 23; Okano 1959: 277, pl. 183, fig. 6; Moriuti 1982: 1: 53, 2: pl. 1, figs. 24, 25.

Diagnosis. This species is similar to A. nobilis, but can be distinguished by the following characteristics: the yellowish long hairs of hind tibia, and the relatively long basal part of the ventral margin of valva in male genitalia.

Specimens examined. [ Taiwan] 1♂, Cuifeng, Taibei County, 2009.II.15, L.Z., Shi leg. (HUNAU) .

Distribution. China (new record: Taiwan); Japan.

Remarks. The adults of this species usually fly in late spring and visit the flowers Rhododendron reticulatum (Ericaceae) and Acer sp. (Aceraceae), and the males swarm above the flowers of Spiraea thunbergii (Rosaceae) in the sunlight (Hirowatari 1997). This species has been recorded for the first time in China in this paper.