Alnetoidia (Alnetoidia) gracilis sp. nov.

(Fig. 4)

Description. Body yellowish, without markings.

Abdominal apodemes (Fig. 4 a) extended to hind margin of 4th sternite.

Pygofer side (Fig. 4 b) with several rigid setae on posterior margin; dorsal appendage sinuated; ventral appendage slim, extended from ventral margin of pygofer side. Subgenital plate (Fig. 4 e) with group rigid setae near base, row of marginal microsetae from near base to apex, shorter than the basal ones, with 3 macrosetae subbasally along outer margin. Style (Figs 4 f, g) with apical part footlike. Connective (Fig. 4 h) broad, lateral arms short and broad. Aedeagal shaft (Figs 4 i–l) tubular, curved dorsad, paired basal processes slim and long, the length and thickness slightly varies among individuals, some specimens bearing a small spinelike process on lateral margin; dorsal apodeme large in lateral view, preatrium short; gonopore apical on ventral side.

Measurement. Male 3.42mm, female 3.45mm.

Material examined. Holotype: ♂, CHINA, Sichuan Prov., Mt. Emei, 950m, 30 x 1999, coll. I. Dworakowska ; paratypes: 1♂, 1 xi 1999, other data same as holotype; 1♀, 29 x 1999, other data as holotype; 18♂♂, Sichuan Prov., Ya’an, Hongta Botanic Garden, Pterocarya stenoptera, 12 vii 2010, coll. Cao Yanghui .

Host. Pterocarya stenoptera .

Remarks. The new species is similar to A. (Alnetoidia) dujuanensis Song & Li, but differs in having the pygofer dorsal appendage shorter, the aedeagal shaft distinctly curved dorsad and the paired basal processes shorter and extended from the dorso-lateral margins of the shaft.

Etymology. The specific epithet is derived from the Latin word “ gracilis ”, referring to the slender lateral processes of the aedeagal shaft.