ABSTRACT Despite the species richness of Dolichopodidae or long-legged flies world-wide (over 8000 species) and its prominent role as an important and ubiquitous natural enemy of pests in a variety of habitats, only four species have been recorded from Saudi Arabia prior to this study. As part of a study on the biodiversity of Diptera of south-western Saudi Arabia, a survey of the Diptera fauna of Jazan, Abha and Najran was performed from 2012 to 2016 using mainly Malaise traps, sweep nets and light traps. Twenty-one species belonging to seven subfamilies of Dolichopodidae were identified and recorded in this study, 20 species and five subfamilies of these are recorded for the first time from south-western Saudi Arabia. This study increases the total number of dolichopodid species in Saudi Arabia (including previous records) to 25. Twenty-one images are presented. A key to genera and species of the Dolichopodidae of the Arabian Peninsula is provided. A list of all dolichopodid species recorded from Saudi Arabia and the Arabian Peninsula is given. Biological information (if known) and world distribution are included. It seems likely that further species will be discovered with more research involving the use of mass trapping methods. http://www.zoobank.org/urn:lsid:zoobank.org:pub:CA325144-D56F-438A-9E2C-681E89862747

中文翻译：

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阿拉伯半岛 Dolichopodidae（双翅目）：鉴定关键、更新的物种清单和来自沙特阿拉伯的新记录

摘要 尽管世界范围内的 Dolichopodidae 或长腿苍蝇物种丰富（超过 8000 种），并且作为各种栖息地中重要和普遍存在的害虫天敌的突出作用，但在沙特阿拉伯之前仅记录了四种这项研究。作为沙特阿拉伯西南部双翅目生物多样性研究的一部分，在 2012 年至 2016 年期间，主要使用 Malaise 陷阱、扫网和光陷阱对 Jazan、Abha 和 Najran 的双翅目动物群进行了调查。本研究鉴定并记录了属于 Dolichopodidae 7 个亚科的 21 种，其中 20 种和其中的 5 个亚科首次在沙特阿拉伯西南部记录。这项研究将沙特阿拉伯的长链足类物种总数（包括以前的记录）增加到 25 种。展示了二十一张图片。提供了阿拉伯半岛 Dolichopodidae 属和种的关键。给出了从沙特阿拉伯和阿拉伯半岛记录的所有长足类物种的清单。包括生物信息（如果已知）和世界分布。通过更多涉及使用质量捕获方法的研究，似乎可能会发现更多的物种。http://www.zoobank.org/urn:lsid:zoobank.org:pub:CA325144-D56F-438A-9E2C-681E89862747 通过更多涉及使用质量捕获方法的研究，似乎可能会发现更多的物种。http://www.zoobank.org/urn:lsid:zoobank.org:pub:CA325144-D56F-438A-9E2C-681E89862747 通过更多涉及使用质量捕获方法的研究，似乎可能会发现更多的物种。http://www.zoobank.org/urn:lsid:zoobank.org:pub:CA325144-D56F-438A-9E2C-681E89862747