Eristalinus punctulatus (Macquart, 1847) is a hoverfly (Syrphidae) that is native to Australia. Eristalinus belongs within tribe Eristalini, which is well known for its pollination efficiency. Although there is not much information available about this species, the abundance and floral constancy of this group of flies make E. punctulatus an appropriate candidate for use as pollinating agent. However, like most other eristalines, there is a lack of information regarding basic aspects of its biological cycle, as well as the morphology of the preimaginal stages. In this paper, the morphology of the egg, the first and third larval instars and the puparium of E. punctulatus are described for the first time. A description of the head skeleton is also given to improve understanding of the larval feeding habits of this species. Additionally, a diagnostic key of the third larval instar is provided together with an update of the pupal stage key, including all the Eristalinus species whose preimaginal morphology has already been described. The most noteworthy morphological features of the larva of E. punctulatus are the presence of lappets, the proportions of the anterior spiracles and the number and size of the facets.

中文翻译：

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对澳大利亚金黄色蜻蜓的想象前阶段的描述，埃斯特里纳斯·克雷格图拉（Macquart，1847）（双翅目：Syrphidae）

Eristalinus punctulatus（Macquart，1847）是一种食蚜蝇（Syrphidae），原产于澳大利亚。Eristalinus属于Eristalini部落，以其授粉效率而闻名。尽管没有太多有关此物种的信息，但这一群果蝇的丰度和花的恒定性使其成为一种适合用作授粉剂的棘球E。但是，像大多数其他雌激素一样，缺乏有关其生物学循环基本方面以及想象前阶段形态的信息。本文研究了鸡蛋的形态，第一，第三龄幼虫以及点状棘球的形态。是第一次描述。还对头部骨骼进行了描述，以增进对该物种幼虫摄食习惯的了解。此外，还提供了第三龄幼虫的诊断钥匙以及the阶段钥匙的更新，包括所有已经描述了成像前形态的Eristalinus物种。的幼虫的最值得注意的形态特征E. punctulatus是lappets的存在，前气孔和面的数量和大小的比例。