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The endemic Notoreas perornata (Walker, 1863) complex (Lepidoptera: Geometridae: Larentiinae) from the North Island and northern South Island of New Zealand is reviewed. Larvae feed on Pimelea spp. (Thymelaeaceae), frequently in highly fragmented and threatened shrubland habitats. Allopatric populations tend to differ in size and wing pattern characteristics, but not in genitalia; moreover extensive variation renders recognition of subspecies / allopatric species based on any species concept problematic. A mitochondrial DNA gene tree is not congruent with morphology and indicates rapid recent divergence that has not settled into diagnosable lineages. Based on our results, we synonymise Notoreas simplex Hudson, 1898 with N. perornata (Walker, 1863), and retain N. perornata as a single, highly diverse but monotypic species. All known populations are illustrated to display variation. For conservation purposes, we recommend the continued recognition within the species of 10 populations or groups of populations that appear to be on the way to diverging at subspecific level based on morphological and/or DNA data. The conservation status of all these populations is reviewed. One conservation unit, comprising the populations from Westland, has not been seen since 1998 and is feared possibly extinct.

Mecodema (Coleoptera: Carabidae: Broscini) is a hyperdiverse endemic New Zealand genus of ground beetles with only a few geographically widespread species found throughout the two main islands, as well as many offshore islands. Using specimens from a number of private and institutional collections, in addition new specimens were acquired by extensive pitfall trapping, we describe or redescribe all of the known North Island Mecodema species. Additionally, we redescribe three South Island species from the former genus Metaglymma, as morphological evidence shows that these species are nested within Mecodema. Species descriptions are formed by using 128 morphological characters, which include external characters, as well as both male and female internal structures. There are four new combinations: Mecodema antarctica comb. n., M. aberrans comb. n., M. moniliferum comb. n. and M. tibiale comb. n. We synonymise M. occiputale under Mecodema curvidens, and M. sulcatum under Mecodema oblongum, and reinstate M. scitulum Broun (northwest Hunua Range, Auckland). Twenty four new species are described: Mecodema argentum sp. n., M. atuanui sp. n., M. dunnorum sp. n., M. genesispotini sp. n., M. godzilla sp. n., M. jacinda sp. n., M. kipjac sp. n., M. kokoroiho sp. n., M. mohi sp. n., M. ngaiatonga sp. n., M. ngaitahuhu sp. n., M. papake sp. n., M. perexiguus sp. n., M. rusticulus sp. n., M. temata sp. n., M. teparawhau sp. n., M. teroroa sp. n., M. tewhara sp. n., M. tuhoe sp. n., M. undecimus sp. n., M. wharekahika sp. n., M. xylanthrax sp. n., M. yconomus sp. n., M. zonula sp. n. North Island regional species endemism is very high in Northland (15/16 endemic species), with species becoming more widespread in the southern regions, e.g. Wellington only has two endemic species from a total of eight species. This research increases the total number of described Mecodema species to 102, and will allow a modern taxonomic framework for completion of the revision of the South Island species.

Etheophanus Broun is considered a molytine based on the form of the pharyngeal plate, presence of a small spiculum relictum in the male, and presence of a pair of small internal apodemes on the antero-lateral corners of the 5th abdominal ventrite of the female. Examination of primary type specimens and newer material confirm one new species Etheophanus kuscheli sp. n. and two synonomies (Etheophanus nitidellus Broun, 1923 [= Etheophanus obscurus Broun, 1923] and Etheophanus striatus Broun, 1910 [=Etheophanus punctiventris Broun, 1914]). Generic and species diagnoses, a key to the species, and lectotype designations for three species are included. Phylogenetic reconstructions based on a combined analysis of the nuclear 28S rRNA and mitochondrial cytochrome c oxidase subunit I genes confirmed the status of E. kuscheli and a species complex, the E. nitidellus/E. optandus clade distributed in the southern portion of the South Island. The relationship E. pinguis [northern North Island] (E. striatus [southern North Island, northern South Island] (E. kuscheli [northwestern South Island] (E. nitidellus, E. optandus [southwestern North Island]) corresponds to geographic patterns found in other beetle lineages. Etheophanus striatus is composed of three lineages, one widespread in the north and south islands and two allopatric populations in the northwest South Island. The E. nitidellus/E. optandus complex includes four distinct lineages, one restricted to Fiordland, the other three sympatric in the region affected by the Haast Corridor.

We describe two new species of Clitarchus Stål from Northland, New Zealand. Clitarchus rakauwhakanekeneke sp. nov. is described from the Poor Knights Islands and Clitarchus tepaki sp. nov. is described from the Te Paki / North Cape area and the Karikari Peninsula at the northernmost tip of New Zealand. Two new synonymies are proposed including Clitarchus multidentatus Brunner (syn. nov.) and Clitarchus tuberculatus Salmon (syn. nov.) as synonyms of Clitarchus hookeri (White). Clitarchus magnus Brunner, recorded from Thailand, is transferred to Ramulus Saussure and given the replacement name Ramulus changmaiense nom. nov. The holotype of C. multidentatus was recorded as being collected from New Caledonia; however we believe this is a labelling error and the specimen was collected from New Zealand. These taxonomic changes render Clitarchus endemic to New Zealand and consisting of three species; C. hookeri, C. rakauwhakanekeneke and C. tepaki. Keys to the adult males and females of Clitarchus species are given in addition to notes on host plants, ecology and geographic distributions.