Dinomachus sikhimensis Distant, 1903

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 : 54

Dinomachus sikhimensis Distant, 1903

( Fig. 4 )

Dinomachus sikhimensis Distant, 1903a: 38 (original description). Scudder (1957: 172,181) (in key, diagnosis). Slater (1964: 746) (catalogue, distribution). Zheng & Zou (1981: 110, 603) (diagnosis, distribution, photo). Péricart (1999: 84) (lectotype designated). Péricart (2001: 102) (catalogue, Palaearctic).

Material examined. Non-types : 3 ♂ (TUA)— LAOS: 1 ♂, 20°37'N, 102°00'E, alt . 837 m, Lak 11 Waterfall, 11 km South-east from Oudomxay, Oudomxay Prov. , 4.X.2009, 1, Hiroyuki Wakahara ; 2 ♂, Same date, Teruaki Ban.

Diagnosis: Recognized among congeners of Dinomachus by a combination of the following characters: head reddish brown ( Fig. 4 ); antennal segment II nearly twice as long as segment I; labium extending beyond middle of abdomen; rostral segment III extending well beyond base of abdomen; pronotum yellowish brown ( Fig. 4 ); posterior margin of pronotum deeply impressed before scutellum; basal half of scutellum reddish brown ( Fig. 4 ); hemelytra not extending beyond apex of abdomen; corium entirely brown ( Fig. 4 ); legs with reddish brown annulations ( Fig. 4 ); profemur armed with 2 spines; laterotergites each with pale yellow marking.

Distribution. China, Laos (Oudomxay Prov.), India. New to Laos.

Biological notes. The specimens were collected on fig trees Ficus sp. in the forest along a mountain stream, along with several other heterogastrid and rhyparochromid species.

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.