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 Webbia diversicauda Browne, 1972 Fig. 80A, B, I Webbia diversicauda Browne, 1972: 26. Type material. Holotype (NHMUK). Diagnosis. 2.75-2.9 mm long (mean = 2.83 mm; n = 5); 3.5-3.73 x as long as wide. This species is distinguished by the circumdeclivital margin denticulate; declivital face bearing a large triangular spine that is much broader at apex than base; base of spine narrow, occupying approximately 1/4 of declivital length; acute spine at elytral apex arising from the second interstriae, distinctly separated from the suture; discal interstriae 1 prolonged into a short spine over the declivity. Similar species. Webbia biformis , W. pabo . Distribution. West Malaysia, Thailand. Host plants. Unknown. Figure 80. Dorsal, lateral and declivital view of Webbia diversicauda holotype, 2.75-2.9 mm ( A, B, I ), W. duodecimspinata , 3.1-3.5 mm ( C, D, J ), W. pabo , 2.3-2.5 mm ( E, F, K ), and W. quatuordecimspinata , 2.8-3.0 mm ( G, H, L ).