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 cruralis (Schedl, 1975) comb. nov. Fig. 66G, H, L Xyleborus cruralis Schedl, 1975b: 456. Coptodryas cruralis (Schedl): Beaver 1995a : 201. Type material. Holotype (NHMW). New records. Cambodia: Siem Reap, Angkor Thom, 26.v.2003, J. Constant, K. Smets & P. Grootaert, ex light trap (RABC, 1). Laos: Vientiane, Gi Sion vill., de Tha Ngone, 28.ii.1965, J.L. Gressitt, ex light trap (BPBM, 1). Diagnosis. 3.0-3.1 mm long (mean = 3.03 mm; n = 3); 2.5-2.82 x as long as wide. This species is distinguished by its large size; elytral disc broadly and deeply transversely impressed with a saddle-like depression from scutellum to declivital base; declivity deeply sulcate, its margins lined by large tubercles on interstriae 1 and 3-6; elytral base emarginated from sutural margin to interstriae 4 to accommodate mycangial tuft, mycangial tuft setae long, very dense; and posterolateral costa absent. Similar species. Microperus nugax , M. sagmatus , M. undulatus . Distribution. Cambodia*, Laos*, Thailand. Host plants. Unknown. Remarks. The species is transferred to Microperus because of the following characters: pronotum type 2 (viewed dorsally), antennal club flat, type 3, pronotal disc punctate, and scutellum narrow, minute and convex.