Arcobaetis gracilentus comb. nov.

Nigrobaetis gracilentus: Kang et al. 1994: fig. 7A-L.

Diagnosis.

Larva. Following combination of characters distinguish Arcobaetis gracilentus comb. nov. from other species of Arcobaetis gen. nov.: A) distal margins of segments in middle part of flagellum without long spines; B) labial palp segment III sub-quadrangular, at base narrower than distal margin of segment II (Kang et al. 1994: fig. 7E); C) hind protoptera present (Kang et al. 1994: fig. 7G); D) tergalii present on abdominal segments I-VII; E) posterior margin of tergum VI with triangular spines, longer than wide (Kang et al. 1994: fig. 7K).

Distribution.

Taiwan.