Cavariella nipponica Takahashi, 1961

Figs 20, 35A

Cavariella nipponica Takahashi, 1961: 8.

Specimens examined.

One ap. viv. fem., China: Liaoning, 29.VI.1984, No. Y 4977-1-2, on Salix, coll. G.X. Zhang and L.J. Liu (Jiang et al. 2011) ; two ap. viv. fems. and two ala. viv. fems. (slides), one ap. viv. fem. (COI: OP956118), Beijing, 14.V.2014, No. 31000, on Salix, coll. Y. Wang, J.J. Tang and F.F. Niu ; one ap. viv. fem. and one ala. viv. fem. (slides), one ap. viv. fem. (COI: OP956116), Sichuan ( Jiuding Mountain), 23.VIII.2013, No. 30077-1-1, host plant unknown, coll. R. Chen ; one ap. viv. fem. and one ala. viv. fem., Beijing, 4.VIII.2017, No. 41401-1-1, on Apiaceae, coll. G.X. Qiao and X. Yang ; two ap. viv. fems. (slides) and one ap. viv. fem. (COI: OP956150), Sichuan ( Aba City), 22.VI.2021, No. 51630-1-1, on Salix, coll. T.Y. Liu and S. Xu ; one ap. viv. fem., Beijing, 17.VII.2016, No. 37063-1-1, on unknown, coll. R.J. Zhang and S.F Xu.

Diagnosis.

ABD TERG VIII with long conical supra-caudal (Fig. 20H), 0.15-0.27 mm, 0.92-1.85 × cauda; PT mostly short than Ant. VIb (Fig. 20C); URS wedge-shaped (Fig. 20D), 1.01-1.07 × HT II; SIPH long clavate (Fig. 20G), 2.16-2.59 × cauda, 0.20-0.22 × body length; Ant. III-V each with 26-36, 5 or 6, 1 or 2 circular secondary rhinaria in alatae (Fig. 20K).

Comment.

The species has some variations in China, as follows: PT 0.83-1.26 × Ant. VIb, in most specimens PT shorter than Ant. VIb, but sometimes PT slightly longer than Ant. VIb (original description: PT 0.70-0.75 × Ant. VIb); URS 1.01-1.07 × HT II (original description: URS 1.40 × HT II) (Takahashi 1961).

Biology.

Primary host plant: Salix; secondary host plant: Apiaceae including Anthriscus, Angelica, Heracleum (Takahashi 1961). The species feeds on young leaves of the host plant (Fig. 35A).

Distribution.

China (Beijing, Hebei, Liaoning, Sichuan), Bhutan, Japan, Russia.