A monograph of the Xyleborini (Coleoptera, Curculionidae, Scolytinae) of the Indochinese Peninsula (except Malaysia) and China Author Smith, Sarah M. Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan 48824, USA https://orcid.org/0000-0002-5173-3736 camptocerus@gmail.com Author Beaver, Roger A. 161 / 2 Mu 5, Soi Wat Pranon, T. Donkaew, A. Maerim, Chiangmai 50180, Thailand Author Cognato, Anthony I. Department of Entomology, Michigan State University, 288 Farm Lane, East Lansing, Michigan 48824, USA text ZooKeys 2020 983 1 442 http://dx.doi.org/10.3897/zookeys.983.52630 journal article http://dx.doi.org/10.3897/zookeys.983.52630 1313-2970-983-1 7DED4CE2934C4539945F758930C927F9 C890C7FD4B2D57A8B1A062305ED42D53 Microperus perparvus (Sampson, 1922) Fig. 69A, B, I Xyleborus perparvus Sampson, 1922b: 151. Microperus perparvus (Sampson): Maiti and Saha 1986 : 97. Coptodryas perparva (Sampson): Wood and Bright 1992 : 826. Xyleborus tsukubanus Murayama, 1954: 184. Synonymy: Beaver et al. 2008 : 233. Type material. Syntypes Xyleborus perparvus (NHMUK). New records. China: Hong Kong, Tai Po Kau, vi.2017, J. Skelton (MSUC, 1). Jiangxi, Long Nan, 10.vii.2016, Lv-Jia, Lai, S-C., ex Eriobotrya japonica (RABC, 1). Sichuan, Mt. Emei, 18.viii.2016, Tian-Shang (RABC, 1). S Yunnan, Xishuangbanna, 20 km NW Jinghong, vic. Man Dian (NNNR), 22°07.80'N , 100°40.05'E , 740 m, fallow, 18.vi.2008, A. Weigel (RABC, 1); as previous except: forest, 28.vi.2008 (RABC, 1); as previous except: 730 m, forest, EKL, 6.iv.2009, L. Meng (RABC, 6); as previous except: 23 km NW Jinghong, vic. Na Ban (NNNR), 22°09.49'N , 100°39.92'E , rubber plantation, 730 m, 15.vi.2008, A. Weigel (RABC, 2); as previous except: 25 km NW Jinghong, vic. Zhang Zhi Chang (NNNR), 22°11.06'N , 100°39.05'E , 780 m, rubber plantation, EKL, 15.vi.2008, A. Weigel (RABC, 2). Vietnam: Cao Bang, 22°36.454'N , 105°52.083'E , 1661 m, 15.iv.2014, VN38, Cognato, Smith, Pham, ex 1-3 cm diameter branch and twig (MSUC, 2). Dong Nai, Cat Tien N.P., 11.40817 , 107.38098 , 134 m, 22-24.ii.2017, VN81, A.I. Cognato, T.A. Hoang, ex FIT (MSUC, 1). Diagnosis. 1.5-1.9 mm long (mean = 1.64 mm; n = 5); 2.71-2.86 x as long as wide. This species is distinguished by the elytral disc flat with short and steep obliquely truncate declivity; posterolateral carina weak, denticulate; declivital interstriae straight from base to apex, never laterally broadened; denticles on declivital summit denser and of equal size to those on declivital face; declivital face shagreened, dull. Similar species. Microperus kirishimanus , M. latesalebrinus , M. nudibrevis . Distribution. Bangladesh, China (Fujian, Guizhou, Hong Kong*, Hunan, Jiangxi*, Sichuan*, Xizang, Yunnan*), India (Andaman Is, Assam, West Bengal), Indonesia (Ternate), Japan, East & West Malaysia, Myanmar, New Guinea, Solomon Islands, Taiwan, Thailand, Vietnam*. Host plants. Polyphagous, possibly with some preference for Dipterocarpaceae ( Beaver and Liu 2010 ). Figure 69. Dorsal, lateral and declivital view of Microperus perparvus , 1.5-1.9 mm ( A, B, I ), M. pometianus , 1.2-1.7 mm ( C, D, J ), M. quercicola , 1.8-2.0 mm ( E, F, K ), and M. recidens , 1.9-2.0 mm ( G, H, L ).