A Revision of Lasionycta Aurivillius (Lepidoptera: Noctuidae) for North America and notes on Eurasian species, with descriptions of 17 new species, 6 new subspecies, a new genus, and two new species of Tricholita Grote Author Crabo, Lars Washington State University, Bellingham, United States of America Author Lafontaine, Donald Agriculture and Agri-Food Canada, Ottawa, Canada text ZooKeys 2009 2009-12-18 30 30 1 156 journal article 10.3897/zookeys.30.308 ca35c50f-b0c5-4032-b06d-f71b00710c8d 1313–2970 576576 C26E1A82-0DD4-48EF-865C-9D8AA788B739 Lasionycta quadrilunata (Grote) Figs 54–56, 166, 167, 222, 223. Map 14 Anarta quadrilunata Grote, 1874b: 244 Lasiestra quadrilunata ; McDunnough 1938: 71 . Lasionycta quadrilunata ; Lafontaine et al. 1986: 263 . Lasionycta quadrilunata yukona Lafontaine, 1986: 264 . Type material. Anarta quadrilunata : holotype ♀ [ USNM , examined]. Type locality: Colorado Territory. Lasionycta quadrilunata yukona : holotype ♀ [ CNC , examined]. Type locality: 17 km WNW Burwash Flats, Yukon . Diagnosis . Lasionycta quadrilunata is an alpine species characterized by a large hindwing discal spot, a short broad digitus resembling an obtuse triangle, and a small rounded cucullus bearing a corona of four rows of setae. Th e forewing is light gray or slate gray with a yellow or olive tint. Th e dark-gray transverse lines are prominent but the spots are indistinct. Th e female bursa is similar to that of L . staudingeri but L . quadrilunata has an increased number of short setae on abdominal segment VIII, similar to L . lagganata . The male antenna of quadrilunata is weakly biserrate, almost beadlike (1.4× the width of the central shaft). Distribution and biology. Records of L . quadrilunata form an arc on a map, from south-central Alaska down the spine of the Rocky Mountains to Colorado . It flies over scree tundra and is diurnal. The flight period is from mid-July to early August. Geographical variation. The populations of L . quadrilunata are arranged in two subspecies.