Explanation of Names
Polychrysia esmeralda (Oberthür, 1880)
Plusia esmeralda Oberthür, 1880
Deva trabea Smith, 1895
* phylogenetic sequence #931182
forewing length 1.5-1.8 cm (Powell & Opler, 2009)(1)
Alaska south and west across the Canadian prairies to Saskatchewan (Powell & Opler, 2009).
Lush meadows and woodland edges in the mountains and foothills, and in flower gardens (E.H. Strickland Museum).
Larvae feed on monkshood
sp.) and larkspurs
sp.), and are pests on these plants in Edmonton. Adults will visit fireweed
sp.) blossoms for nectar (E.H. Strickland Museum).
Larvae appear around late April or May and burrow into the growing leader of the host plant, causing considerable damage. The spun cocoon made out of fine, gold silk (E.H. Strickland Museum).
Adults are easily caught by hand when visiting flowers (E.H. Strickland Museum).
Lafontaine, J. D. & R. W. Poole 1991. Moths of America North of Mexico, Fascicle 25.1: p.67; pl.1.30-32
Powell, J. A. & P. A. Opler 2009. Moths of Western North America, Pl.49.30f; p.278