Enargia decolor

• Main Author: Schmidt, Christian
• Format: Other/Unknown Material
• Language: unknown
• Published: 2010
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Lepidoptera; Noctuidae; Enargia; Enargia decolor; Northwest Territories; Canada; British Columbia; Forbes; Ferguson
• Online Access: https://zenodo.org/record/3788544; https://doi.org/10.5281/zenodo.3788544

Enargia decolor (Walker, 1858) Figs 35–54, 57, 60, 63 Mythimna decolor Walker, 1858: 1658. Enargia discolor; Smith 1900; misspelling. Cosmia discolor; Dod 1905; Dod 1910; misspelling. Enargia decolor; Franclemont 1939. Enargia decolora; Hampson 1910: 239; unjustified emendation. ‡ Enargia decolora ab. mia Strand, 1916: 164; unavailable infrasubspecific name. ‡ Enargia decolora ab. sia Strand, 1916: 164; unavailable infrasubspecific name. Type material. Mythimna decolor: male holotype. BMNH, examined. Type locality: “Orilla [sic], West Canada ” [Orillia, Ontario, Canada]. Diagnosis. Enargia decolor is externally most similar to and broadly sympatric with E. infumata. Specimens with little dark shading can also be similar to E. fausta, particularly females of both species. About 90% of E. decolor specimens can be recognized by one or more of the following external characters: reniform spot lacking pronounced dark scaling at base, or if dark scaling present, not darker than color of adjacent medial line; claviform often present as dark dash; well-marked specimens with pronounced hindwing medial line; male antenna slightly serrate, not prismatic. Internally, in males the corona extends only halfway along the ventral margin of the valve (2/ 3 in E. infumata and E. fausta, Figs 55, 56), and the vesica cornuti and aedeagus are larger (compare Fig. 60 to Figs 58 and 59). Females have a longer ovipositor and corpus bursae (Fig. 63). Distribution and biology. Enargia decolor has a boreal-transcontinental distribution, occurring across the Canadian boreal plain and then southward through the western cordillera at higher elevations, where it is presumably limited by the availability of trembling aspen and possibly other poplars. Records for examined specimens range from northernmost British Columbia (Ft. Nelson) and south-western Northwest Territories (Ft. Smith) east to New Brunswick; also reported from Nova Scotia (Ferguson 1954), Ohio (Rings et al. 1992) and New York (Forbes 1954). In the western United States, specimens ...