Accepted by P. Goldstein: 13 Aug. 2018; published: 23 Oct. 2018 135 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2018 Magnolia Press Zootaxa 4504 (1): 135–137 http://www.mapress.com/j/zt/ Correspondence https://doi.org/10.11646/zootaxa.4504.1.8 http://zoobank.org/urn:lsid:zoobank.org:pub:D188728E-BC65-48E3-88FF-AE91164D2C8D Description of a new species from the genus Eugoa Walker, 1858 (Lepidoptera: Erebidae: Arctiinae) from the Solomon Islands KAROL BUCSEK 1 & MICHAL RINDOŠ 2, 3 ¹Slovak Academy of Sciences, Institute of Zoology, Dúbravská cesta 9, SK-845 06 Bratislava Slovak Republic. E-mail: monosyntaxis@gmail.com ²Biology Centre of the Czech Academy of Sciences, Institute of Entomology, CZ-37005 České Budějovice, Czech Republic. E-mail: michal.rindos@gmail.com 3 Faculty of Science, University of South Bohemia, CZ-37005 České Budějovice, Czech Republic. The genus Eugoa Walker, 1858 belongs to the tribe Lithosiini and occurs across the Old World, excluding the Western Palearctic Region. Currently, it contains around 120 species, most of them distributed across Asia (Bucsek 2016a, b; Dubatolov & Bucsek 2016; Schaus 1922). Ten additional species have been described from Australasia (Bethune-Baker 1904; Rothschild 1915). Since the 19 th century, several authors have addressed the taxonomy of the genus Eugoa (Buscek 2008, 2012, 2016a, b; Černý & Bucsek 2014; Hampson 1891, 1898, 1900; Rothschild 1915; Seitz 1914; Van Eecke 1930), but only a few described their habitat preferences (e.g. Holloway 2001). These small to medium sized moths with brown, or brown—cream coloured forewings inhabit a wide range of forest types (e.g. alluvial, dipterocarp, heath, kerangas, etc.) from mangroves and lowland-coastal forests (about 300m asl) up to upper montane forests (about 1500 m asl). Unfortunately, life history data for species in the genus Eugoa still remain unavailable. Here, we present a new species from Guadalcanal Island recovered by M. Rindoš during a study of the Lepidoptera collection of NMPC. One male specimen was caught at light at the edge of the upper parts of a secondary lowland forest and a clearing on a hill (Fig. 1). Photos of adults were made on a Leica DFC 450 camera (Leica Planapo 0.5x WD 187 mm objective). Morphological observations of genitalia were done using a microscopic glass and Canada balsam on a Leica M205FA and photographed with an additional Canon EOS 60D camera. Subsequently genitalia were demounted and stored in a tube with glycerine under the studied specimen. Later, post-shooting photo corrections were made in Adobe Photoshop CS6. Institutional abbreviations are as follows: NMPC—National Museum, Prague, Czech Republic MWM—Museum Witt, Munich, Germany BMNH—British Museum of Natural History, London, United Kingdom BC—Biology Centre, v.v.i., Czech Academy of Sciences, České Budějovice, Czech Republic Eugoa salomonica Bucsek & Rindoš, sp. nov. (Figs. 2, 3, 5) Diagnosis. As to the nearest relative of the new species, based on the morphology of the genitalia, we can consider Eugoa silvia Bucsek, 2016 (Fig. 4) from Halmahera Island, Moluccas, Indonesia. Eugoa salomonica, sp. nov. differs from E. silvia by having a slightly smaller body size, different pattern in the discal area of the forewings, where the newly described species has a dark brown subreniform spot instead of the straight strip connecting the postbasal and postdiscal stripes. Also the postdiscal stripe is without a notch on the outer margin. The male genitalia of E. silvia differs by the shape of the valve lacking an evident tip on the end and marginal serration (Fig. 6). The juxta is without a sclerotized top with spines. The phallus is smaller and less curved and the basal diverticulum has a longer and sharper tip. Type material. Holotype, male, Solomon Islands, Guadalcanal, ca. 3,5 km SE of Barana village, (clearing in secondary forest, at light), 09° 29.8' S, 159° 59.5' E, 190 m, 24. xi. - 14. xii.2013, leg. Jiří Hájek, the holotype is deposited in NMPC.