Scaptodrosophila nigricostata sp. n.

Figs 5E-H, 13

Type material.

Holotype ♂ (SCAU, No. 128253): CHINA: Baihualing, Baoshan, Yunnan, alt. 1400 m, 7.vi.2011, ex tussocks, HW Chen. Paratypes: CHINA: 1♂, 4♀ (SCAU, Nos 128248-51, 128374), HW Chen, JJ Gao, same data as holotype; 1♂ (SCAU, No. 128254), Wangtianshu, Mengla, Yunnan, 21°47'N, 101°63'E, alt. 580 m, 23.iv.2007, HW Chen.

Diagnosis.

This species is similar to S. nigripecta sp. n. in the shape of the paramere and the pattern on the mesonotum (Fig. 13C, D), but can be distinguished from the latter by having the mesonotum mostly yellow (Fig. 5G), and the aedeagus slender and rod-like (Fig. 13C, D); see under that species.

Description.

Male and female: Head (Fig. 5E): frons yellowish brown with a brown band anteriorly. Pedicel yellowish brown; first flagellomere yellowish brown. Facial carina yellowish brown, short and broad, as 1/3 length as face.

Thorax (Fig. 5F, G): mesonotum with three dark brown longitudinal stripes medially and sublaterally. Acrostichal setulae in ca. 8-10 irregular rows. Scutellum yellowish brown, dark brown near basal scutellar setae, pale at tip. Pleura brown to dark brown.

Abdomen (Fig. 5H): all tergites yellowish brown with dark brown caudal bands, the caudal bands on tergites II and III narrowed medially.

Male terminalia (Fig. 13A-D): epandrium with ca. 15 setae near posterior and ventral margins per side. Surstylus with seven peg-like prensisetae. Hypandrium with a pair of paramedian setae and pubescence medially. Paramere with seven sensilla medially and pubescence distally. Aedeagus lacking pubescence.

Female terminalia (Fig. 13E): oviscapt with one subapical trichoid ovisensillum, 16, 11 and 5 peg-like ovisensilla per side on ventral, dorsal and apical margins, respectively.

Measurements [holotype (paratypes range in 2♂, 4♀), in mm]: BL = 3.38 (2.86-3.33, 2.86-3.29), ThL = 1.60 (1.47-1.64, 1.33-1.56), WL = 3.33 (3.20-3.29, 2.67-3.33), WW = 1.29 (1.20-1.24, 1.07-1.33).

Indices: arb = 4/3 (4/3), avd = 1.00 (0.88-1.43), adf = 2.67 (3.20-4.00), flw = 1.67 (1.83-3.00), FW/HW = 0.42 (0.41-0.47), ch/o = 0.13 (0.05-0.13), prorb = damaged (0.46-0.64), rcorb = damaged (0.27-0.36), vb = 1.00 (0.50-1.00), dcl = 0.77 (0.55-0.69), presctl = 0.44 (0.28-0.43), sctl = damaged (0.88-1.18), sterno = 0.73 (0.56-0.92), orbito = 0.56 (0.44-0.56), dcp = 0.47 (0.40-0.50), sctlp = 0.94 (0.86- 1.00), C = 2.11 (2.20-2.59), 4c = 1.23 (0.90-1.18), 4v = 2.15 (2.11-2.29), 5x = 1.80 (1.67-2.20), ac = 2.37 (2.43-2.57), M = 0.68 (0.50-0.65), C3F = 0.96 (0.89-0.96).

Etymology.

A combination of the Latin words: " niger " + " costa ", referring to the black pleura.

Distribution.

China (Yunnan).