Hadrodemius comans (Sampson, 1919)

Smith, Sarah M., Beaver, Roger A. & Cognato, Anthony I., 2020, A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China, ZooKeys 983, pp. 1-442 : 1

Hadrodemius comans (Sampson, 1919) Fig. 62A, B, G

Xyleborus comans Sampson, 1919: 109.

Hadrodemius comans (Sampson): Wood and Bright 1992: 819.

Xyleborus amorphus Eggers, 1926: 147. Synonymy: Beaver 2010: 54.

Xyleborus metacomans Eggers, 1930: 199. Synonymy: Beaver 2010: 54.

Type material.

Syntype Xyleborus comans (NHMUK). Syntypes Xyleborus amorphus (NHMW).

New records.

China: Guangdong, v.2014, Jianguo Wang (RJRC, 1); as previous except: xii.2014 (RJRC, 3). Hong Kong, Tai Po Kau, vi.2017, J. Skelton (MSUC, 1). S Yunnan, Xishuangbanna, 23 km NW Jinghong, vic. Na Ban village (NNNR), 22°10'N, 100°39'E, 700-1000 m, v-vii.2009, L. Meng (NKME, 3; RABC, 2); as previous except: 28 km NW Jinghong, vic. An Ma Xi Zhan (NNNR), 22°12'N, 100°38'E, 700 m, forest, EKL, 28.vi.2008, A. Weigel (NKME, 1); as previous except: 5.iv.2009, L. Meng (RABC, 1).

Diagnosis.

5.0-6.3 mm long (mean = 6.02 mm; n = 5); 1.73-1.88 × as long as wide. This species is distinguished by the declivity plano-concave from suture to interstriae 3, striae 1 at least weakly impressed; entire elytra densely setose with declivital face less densely hairy and dark brown to black vestiture.

This species is similar to H. globus and is distinguished by the strial punctures distinct, interstrial punctures coarser and less closely placed, and vestiture darker.

Similar species.

Hadrodemius globus .

Distribution.

Recorded in the study region from China (Fujian, Guangdong*, Guangxi, Hainan, Hong Kong*, Hunan, Jiangxi, Sichuan, Xizang, Yunnan*, Zhejiang), India (Assam, West Bengal), Laos, Myanmar, Taiwan, Thailand, Vietnam. It also occurs in Malaysia and Indonesia West of Wallace’s line.

Host plants.

Polyphagous ( Beaver 2010).

Figures

Figure 62. Dorsal, lateral and declivital view of Hadrodemius comans, 5.0 - 6.3 mm (A, B, G), H. globus, 4.9 - 5.8 mm (C, D, H), and H. pseudocomans, 6.0 - 7.2 mm (E, F, I).