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 Amasa aspersa (Sampson, 1921) Fig. 7A, B, I Xyleborus aspersus Sampson, 1921: 31. Amasa aspersus [ sic ] (Sampson): Wood and Bright 1992 : 682. Type material. Holotype (NHMUK). Diagnosis. 3.7-3.9 mm long (mean = 3.82 mm; n = 2); 2.11-2.17 x as long as wide. This species is distinguished by the dense and strongly confused declivital strial and interstrial punctures with striae and interstriae indistinguishable. Similar species. None. Distribution. Brunei, East & West Malaysia, Thailand. Host plants. All host records are from the genus Eugenia ( Myrtaceae ), and the species appears to have a fixed host association with this family ( Browne 1961b ). Figure 7. Dorsal, lateral and declivital view of Amasa aspersa , 3.7-3.9 mm ( A, B, I ), A. beesoni paratype, 5.0 mm ( C, D, J ), A. concitata , 4.3-4.5 mm ( E, F, K ), and A. cycloxyster holotype, 3.4 mm ( G, H, L ).