Hexatoma (Eriocera) latigrisea Alexander, 1971

Zhang, Bing, Yang, Qicheng, Li, Yan & Yang, Ding, 2021, Hexatoma (Eriocera) Macquart (Diptera, Limoniidae) from Xizang, China, ZooKeys 1071, pp. 155-173 : 155

Hexatoma (Eriocera) latigrisea Alexander, 1971

Hexatoma (Eriocera) latigrisea Alexander, 1971: 116. Type locality: India, Assam

Specimens examined.

2 males (CAU), China: Xizang, Motuo, 80K, 2014.VII.31, Yan Li (light trap). Holotype: male, Kujjalong , Kameng , North East Frontier Agency , Assam , 4500 feet, June 28-30, 1961 (Schmid).

Diagnosis

. Antenna has 8 segments. Wing is brown, but narrowly yellow at base; anal cells are much paler; cells C and Sc are dark yellow; a narrow white discal area is before cord, including cell R1 to cell M; m-cu is nearly at middle of cell dm. Posterior margin of male ninth tergite has a V-shaped notch, both sides of notch have a process; interbase is triangular, swollen at base.

Redescription

. Male (N = 2): Body length 18.0-19.8 mm, wing length 14.0-16.7 mm, antenna length 3.6-4.1 mm.

Thorax (Figs 1, 2) dull black with blackish brown setae. Legs with blackish brown setae; coxae and trochanters blackish brown; basal 5/6 of femora yellow, outer 1/6 dull black; tibiae obscure yellow, black apically; tarsi dark brown. Wing (Figs 1, 3) brown, narrowly yellowed at base; anal cells much paler; cells C and Sc dark yellow; a narrow white discal area before cord, including cell R1 to cell M; veins brown, more yellow in brightened areas. Venation: R2 moderately oblique, R2+3 relatively short, shorter than R2; cell M1 lacking; m-cu nearly at middle of cell dm. Halter (Figs 1, 2) length approximately 2.2 mm, halter stem pale brown with brown setae; knob brown with blackish brown setae.

Abdomen (Fig. 1) with short black setae. Segments 1-6 extensively glossy black, segments 7-8 dull black.

Male terminalia (Figs 1, 4-8) with 180° rotation, dull black with black setae. Posterior margin of ninth tergite with a V-shaped notch, both sides of notch with a lateral projection; posterior margin of ninth sternite with a deep V-shaped shallow; gonocoxite moderately stubby; clasper of gonostylus with long setae at base, slender, terminal spine decurved; lobe of gonostylus short and stout, terminal margin swollen with long setae; interbase triangular; aedeagus longer, apically directed ventrally.

Female

. Unknown.

Distribution

. India (Assam), China (Xizang).

Remarks

. This species was known previously only from India. With the present contribution it is recorded from China for the first time.