The Australian trunk‐boring cycad weevils of the genera Demyrsus Pascoe, 1872 and Siraton Hustache, 1934 (Molytinae) are sometimes considered as cycad pests when they infest planted cycads and can be transported to other countries. In the present study, the taxonomy of Demyrsus and Siraton is reviewed, and four species are recognised: D. meleoides Pascoe, 1872, D. digmon sp. nov., S. internatus (Pascoe, 1870) and S. roei (Boheman, 1843). The discovery of a second species of Demyrsus illustrates a larger diversity of cycad‐associated weevils in Australia than currently known and identifies a further species with the potential to damage and kill cultivated cycads. The species descriptions and diagnoses are supplemented with illustrations of the habitus and salient structures, a distribution map and an identification key to all species of trunk‐boring cycad weevils in Australia. Their potential hosts are identified from a spatial analysis of their distributions and the distributions of the cycad taxa occurring in this range.

中文翻译：

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对澳大利亚树干无尾苏铁象鼻虫的评论，并描述了1872年Demyrsus Pascoe的第二种（鞘翅目：Curculionidae）

1872年Demyrsus Pascoe属和1934年Siraton Hustache属（Molytinae）的澳大利亚树干无尾苏铁象鼻虫有时被视为苏铁类害虫，当它们侵染了种植的苏铁并可以转运到其他国家时。在本研究中，对Demyrsus和Siraton的分类进行了综述，并确认了四个物种：D。meleoides Pascoe，1872年，D。digmon  sp.。11月的。，  S. internatus（谢帕斯科，1870）和S. roei（Boheman，1843）。发现第二种Demyrsus说明了澳大利亚与苏铁相关的象鼻虫的多样性比目前已知的要大，并确定了另一种可能损害和杀死栽培苏铁的物种。该物种的描述和诊断辅以澳大利亚的所有习性和无性苏铁象鼻虫的习性和显着结构，分布图和识别码的插图。通过对其分布和在此范围内发生的苏铁类分类的分布进行空间分析，可以确定其潜在宿主。