ABSTRACT The Eumolpinae (Coleoptera: Chrysomelidae) from New Zealand are poorly known in terms of species diversity and, logically, of any downstream understanding of species features, including species distribution or ecology. This is true even though some of the species have been recognised as agricultural pests and associated with economic losses in the country. In this work, I have analysed the diversity and distribution of two genera of Eumolpinae that had been the subject of a taxonomic revision in the 1950s, Atrichatus Sharp and Eucolaspis Sharp. My observations, based on relatively abundant material from three collections and newly collected specimens, generally agree with the conclusions of that work, identifying two species of Atrichatus and at least five of Eucolaspis. I provide a new taxonomic character, namely the description of the spermathecae of all the species, as well as refined distribution maps based on available collection data. One new species of Eucolaspis is described, E. kotatou sp. nov., from Te Paki, near Cape Reinga (Northland). In addition, E. antennata Shaw, previously known from only two specimens without locality data, is reported from Rotorua (Bay of Plenty). Despite loose similarities, Atrichatus – mainly distributed in the north of the South Island – and Eucolaspis – broadly sympatric with Atrichatus, but more diverse and widely distributed in the North Island – should not be considered as close relatives based on an important diagnostic character for higher-level systematics of Eumolpinae, namely a dorsal groove on the pygidium, present in the former and lacking in the latter. http://www.zoobank.org/urn:lsid:zoobank.org:act:05CCCC7C-E8DE-41F3-B0D1-F2090D79754B

中文翻译：

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对新西兰 Eucolaspis Sharp 和 Atrichatus Sharp 的分类和分布的评论以及对 E. kotatou sp. 的描述。十一月 (鞘翅目: Chrysomelidae, Eumolpinae)

摘要 新西兰的 Eumolpinae（鞘翅目：Chrysomelidae）在物种多样性方面知之甚少，从逻辑上讲，对物种特征的任何下游理解，包括物种分布或生态学。尽管某些物种已被确认为农业害虫并在该国造成经济损失，但情况确实如此。在这项工作中，我分析了 Eumolpinae 的两个属的多样性和分布，这两个属在 1950 年代曾作为分类学修订的主题，即 Atrichatus Sharp 和 Eucolaspis Sharp。我的观察基于来自三个收藏品和新收集的标本的相对丰富的材料，大体上同意该工作的结论，确定了两种 Arichatus 和至少五种 Eucolaspis。我提供了一个新的分类特征，即所有物种的受精囊的描述，以及基于可用收集数据的精细分布图。描述了一种新的 Eucolaspis，E. kotatou sp。11 月，来自 Te Paki，靠近 Cape Reinga（北地）。此外，罗托鲁瓦（丰盛湾）报告了 E.天线肖，以前仅从两个没有位置数据的标本中得知。尽管有松散的相似之处，但 Arichatus（主要分布在南岛北部）和 Eucolaspis（与 Atrichatus 广泛同域，但在北岛更多样化且分布更广）不应被视为近亲，因为它具有更高的重要诊断特征。 Eumolpinae的-级系统学，即在尾骨上的背沟，在前者中存在而在后者中缺乏。http://www.zoobank.org/urn:lsid:zoobank.org：