Nipponorhynchus mirabilis Takeuchi

Figs 1, 5, 9, 13, 18, 21, 22, 30, 31

Nipponorhynchus mirabilis Takeuchi, 1941: 233; Takeuchi and Tokunaga 1941: figs 1-7; Malaise 1963: 169, 213, figs 138-140; Naito 1973: 96, fig. 2; Jervis and Vilhelmsen 2000: 134, fig. 5 (mouthparts).

Diagnosis.

Head roughened, with punctures. Maxillolabial process about 1.4 × head width and 3 × eye height (Figs 1, 5). Malar space longer than diameter of median ocellus. Posttergite short, narrow, of equal width throughout (Fig. 13). Lancet with single row of annular spines, not more than 4 or 5 spines on basal annuli (Fig. 18). Male genitalia (Figs 21, 22) with valviceps of penis valve round.

Specimens examined.

JAPAN: Mt. Ooginosen, Hyogo Pref., 900 m, 22.V.2006, T. Naito (3 ♀, 1 ♂); Hyogo Pref., Akazai-keikoku, 600 m, 21.IV.2008, T. Naito (2 ♂).

Distribution.

Japan (Honshu).

Host and biological notes.

The host and life history are similar to those of N. bimaculatus . The larva (Fig. 31) also feeds on Chrysosplenium macrostemon Maxim var. shiobarense, but N. mirabilis occurs somewhat earlier in the season, and the head of the larva is black (Fig. 30). See notes under N. bimaculatus .