Limnellia flavitarsis Zhang & Yang, 2009, sp. nov.

Limnellia flavitarsis sp. nov.

(Figs. 1–3)

Diagnosis. Palpi yellow; legs black except fore tarsomeres 1–2 yellow; wings with five distinct white markings in R1 cell (Fig. 1); halters light brown.

Material studied. Holotype 3, China, Sichuan, Emeishan, 29°32'N, 103°19'E, 8.VIII.1998, Ding Yang leg. Paratype: 13, same data as holotype.

Description. Male. Body length 2.10 mm, wing length 2.25 mm.

Head subshiny black; frons with brownish yellow microtomentum except lateral frons with grayish yellow microtomentum; face black, upper face with grayish yellow microtomentum and lower face with brownish yellow microtomentum. Two vertical setae; 1 strong lateroclinate orbital seta; 1 pair of strong ocellar setae. Face with strong setae. Gena with 1 strong seta. Antenna black. Palpi yellow. Gena-to-eye ratio 0.13–0.15.

Thorax subshiny black; mesonotum with guttate markings. 1 presutural seta; 2 strong dorsocentral setae (0+2); 2 notopleural setae; 1 strong supra-alar seta. Anepisternum with 1 strong seta at posterior margin; katepisternum with 1 strong seta. Scutellum black, with 1 pair of scutellar setae. Legs black except fore tarsomeres 1–2 yellow. Wings with five distinct white markings in R1 cell (Fig. 1). Costal vein ratio 0.22– 0.26, M vein ratio 0.67–0.74. Halters light brown.

Abdomen subshiny black with thin brownish yellow microtomentum.

Male genitalia (Figs. 2–3). Epandrium longer than wide, rounded dorsally and ventrally in posterior view (Fig. 2); surstyli small, subquadrangular, not fused with ventral margin of epandrium in posterior view (Fig. 2); aedeagus longer than wide, with V-shaped notch along dorsum (Fig. 3); phallapodeme as a lobe-shaped process attached to posterodorsal portion of aedeagus (Fig. 3).

Distribution. China (Sichuan).

Remarks. Limnellia flavitarsis sp. nov. is distinctly different from other known species in the following combination characters: palpi yellow; fore tarsomeres 1–2 yellow; wings with five distinct white markings in cell R1; halters light brown; epandrium longer than wide; surstyli small, subquadrangular; aedeagus with short and thick anterior projection; phallapodeme as a lobe-shaped process attached to posterodorsal portion of aedeagus.

Etymology. The specific epithet, flavitarsis, refers to the yellow fore tarsomeres.