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Lasionycta

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Lasionycta is a genus of moths of the family Noctuidae.

Species

Lasionycta arietis, Lasionycta insolens, Lasionycta ochracea, Lasionycta sala, Lasionycta wyatti have been transferred to the genus Psammopolia.

References

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Lasionycta: Brief Summary

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Lasionycta is a genus of moths of the family Noctuidae.

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Description

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Description. Head – Antenna of male biserrate and fasciculate, individual segments triangular, 1.9–2.1× as wide as central shaft. Antenna of female filiform and ciliate. Dorsal segments charcoal gray proximally and white distally. Scape white, tuft of scales at dorsal antenna white-tipped gray. Eye normal sized. Palpus of brownish off-white, white, and charcoal scales. Frons with equal mixture of white and dark-gray hair-like scales. Top of head white-tipped dark-gray, dark-gray, and few white scales. Thorax – Vestiture a mixture of light- and medium-gray hair-like scales and white-tipped medium- and dark-gray scales, appearing pencil-lead gray. Prothoracic collar dark gray anteriorly and silver gray posteriorly. Patagium with ground color of thorax centrally and darker gray peripherally. Legs covered with slate gray and white scales. Tarsal segments slate gray with distal white rings. Wings – Forewing length: male 11–14 mm (expanse 30–36 mm); females 13–15mm (expanse 33–36 mm). Ground color of forewing a mixture of medium- and dark-gray, white, and scattered luteous scales, appearing slightly mottled pencil-lead gray. Basal, antemedial, and postmedial lines double, dark gray with lighter gray filling, strongest at costa. Basal and antemedial line jagged, zigzagged. Medial line dark gray, complete. Postmedial line scalloped between veins, inner part clearly defined and outer part barely visible, broadly convex from costa to bottom of cell, and then nearly straight to posterior margin of wing. Subterminal line pale gray, irregular, preceded by a darker gray shade forming chevrons between veins. Spots dark gray. Orbicular spot round to oval, filled with light gray peripherally and a dark-gray ocellus centrally, lighter filling usually similar to filling of transverse lines, rarely lightest shading on forewing. Reniform spot kidney shaped, variable in size and conspicuousness, barely visible in a few specimens and complete and filled with pale gray peripherally and dark gray centrally in most specimens. Claviform spot filled with ground color, extending ¼ to ½ distance from antemedial line to postmedial line. Fringe dark gray, very weakly checkered with medium-gray between veins. Ventral forewing slightly brownish medium gray with scattered lighter scales along costa, distal to postmedial line, and at apex. Discal spot slightly darker gray. Postmedial line faint, most evident anterior to lower cell. Distal wing uniform dark gray. Dorsal hindwing light brownish gray with slightly darker gray discal spot, postmedial line, and indistinct marginal band. Hindwing fringe two-toned, dark gray proximally and light gray distally. Ventral hindwing a mixture of off-white and scattered gray scales, lighter gray than ventral forewing. Discal spot dark gray, relatively small, ovoid to weakly triangular. Postmedial line relatively faint, sinuous, most evident near costal margin. Marginal band of darker gray suffusion than remainder of wing. Fringe light gray. Abdomen – A mixture of light- and medium-gray scales. Dorsal tuft on first segment with white-tipped charcoal colored scales. Male genitalia – (Fig. 159). Genital capsule and aedeagus as in L. leucocycla species-group and L. perplexa sub-group descriptions. Valve approximately 6× as long as wide. Costal lobe of sacculus larger than that of L. perplexa, extending dorsal to valve margin. Vesica with 0–2 basal cornuti (N = 2), distal straight part slightly shorter than in L. perplexa. Female genitalia – (Fig. 215). Ovipositor lobe, segment VIII, and bursa copulatrix as in L. leucocycla species-group and L. perplexa sub-group descriptions. Corpus bursae approximately 1× as long as ductus bursae and 0.7× as wide as long.
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bibliographic citation
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.
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Distribution

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Distribution and biology. Lasionycta perplexella occurs from southern Yukon to southern Alberta and southern Washington. It is found in subalpine spruce and fir forest, typically at higher elevation than L. perplexa. Adults are nocturnal and come to light. It has been collected from mid-July through August.
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