Nothybus sumatranus Enderlein, 1922

Zhou, Jiale, Marshall, Stephen A. & Yang, Ding, 2021, Synopsis of Nothybidae (Diptera: Brachycera) from China, with redescription of Nothybus absens Lonsdale & Marshall, Zootaxa 4926 (2), pp. 201-223 : 212-216

Nothybus sumatranus Enderlein, 1922

( Figs 78–84 )

Nothybus sumatranus Enderlein, 1922: 176 ; Aczél, 1955: 10; Steyskal, 1977: 31; Papp et al., 2006: 176; Lonsdale & Marshall, 2016: 28 . Syntype (1♀): Indonesia, Sumatra, ZMHU.

Diagnosis. Frons ( Figs 79–81 ) with two velvety black anterior patches. Mesonotum ( Fig. 82 ) with irregularly 8 rows of presutural acrostichal setulae in mid-longitudinal stripe. Wing ( Fig. 83 ) with three clear iridescent spots with second spot in cell r 4+5 displaced apically, crossvein r-m with narrow medial brown spot; subapical spot on CuA 1 absent. Fore basitarsomere ( Fig. 84 ) white with base dark brown. Abdominal tergite 1 and anterolateral corner of tergite 2 widely yellowish orange, tergite 3 laterally with orange regions ( Figs 85, 86 ).

Material examined. CHINA: 1♀, Yunnan, Mengla, Manzhuang (N22.129471°, E101.31371°), 18 Mar. 2018, leg. G. Wang ( CAU) .

Distribution. CHINA (Yunnan) [new record], MALAYSIA, INDONESIA, THAILAND, VIETNAM.

Remarks. The Chinese specimens from our study differ from the redescriptions of Lonsdale & Marshall (2016) as follows: scutum ( Fig. 82 ) with medial stripe not reaching anterior margin, narrowed subapically and slightly fused to posterolateral stripe. Abdominal tergite 2 dark brown with anterior and lateral margins widely yellowish orange, tergite 3 laterally with orange regions, tergite 4 almost yellow except posterior margin dark brown, tergite 6 entirely light yellow ( Figs 78 , 85, 86 ).

Figures

FIGURE 78. Nothybus sumatranus Enderlein, 1922, habitus, female, lateral. Scale bar: 3.0 mm.

FIGURES 79–86. Nothybus sumatranus Enderlein, 1922, female: 79 head, dorsal; 80 same, anterior; 81 same, lateral; 82 thorax, dorsal; 83 wing; 84 fore tarsi; 85 abdomen, dorsal; 86 same, lateral. Scale bars: 1.0 mm.