Dinomachus rhacinus Distant, 1906

Ban, Teruaki, 2018, The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species, Zootaxa 4446 (1), pp. 51-67 : 53-54

Dinomachus rhacinus Distant, 1906

( Fig. 3 )

Dinomachus rhacinus Distant, 1906: 410 (original description). Scudder (1957: 172, 174) (in key, diagnosis). Slater (1964: 745) (catalogue, distribution). Zheng & Zou (1981; 110) (fauna of China, diagnosis, distribution). Péricart (1999: 84) (lectotype designated). Péricart (2001: 101) (catalogue, Palaearctic).

Dinomachus nitidiusculus Distant, 1906: 411 (original description). Scudder (1957: 174) (syn. with D. rhacinus Distant ).

Material examined. Non-types: 1 ♂ (TUA)— LAOS: 1 ♂, 20°14'N, 103°59'E, alt. 1360 m, Ban Saleui, Near Xamneua, Houa phan, 12.VI.2009, light trap, T. Ishikawa .

Diagnosis: Recognized among congeners of Dinomachus by a combination of the following characters: Body approximately 7.0 mm long, covered with erect setae; head reddish brown ( Fig. 3 ); labium attaining mesocoxae; width across humeral angles nearly twice as long as width across anterior angles of pronotum; lateral margin of anterior lobe of pronotum almost straight ( Fig. 3 ); scutellum with Y-shaped carina at middle, and with small pale spot on apex; hemelytra exceeding apex of abdomen; basal half of corium gray, with 2 brown circular spots ( Fig. 3 ); apical half of corium reddish brown ( Fig. 3 ); profemur with 2 spines ventrally at about apical third.

Distribution. China, Laos (Houa phan Prov.), Thailand (Bangkok Dist.), Borneo, India, Sri Lanka. New to Laos.

Biological notes. The specimen was collected near artificial light located adjacent to mountainous region.

Figures

FIGURES 1–5. Habitus of Heterogastridae species from Laos and Thailand. 1–2, Artemidorus pressus, male (1), female (2); 3, Dinomachus rhacinus, male; 4, D. sikkimensis, male; 5, Parathyginus signifier, male. Scales: 1.0 mm.