Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012) | Online Photographs: MPG, BugGuide, iNaturalist, Google, BAMONA, GBIF, BOLD | Technical Description, Adults: Forbes (1954; descriptions of Eupsilia are available online at http://mothphotographersgroup.msstate.edu/MothTalkDownload/MothTalk010.htm) | Technical Description, Immature Stages: Wagner et al. (2011) | |
Adult Markings: Adults easily distinguished by their liliac-brown color, with the basal area of the forewings frosted with grey. The transverse lines are pale and even, not dentate as in other species of Eupsilia except for morrisoni. The antemedian is strong and slightly concave. The postmedian is fairly weak and slightly sinuous and followed by a much stronger, nearly straight line that lies about half-way between the postmedian and subterminal lines (Forbes, 1954). The subterminal line, like the postmedian, is usually fairly weak and sinuous. Sexes are similar. |
Adult Structural Features: The male genitalia of our Eupsilia species are very similar. There is a subbasal sclerotized rugose ridge with setae just below the costa in E. devia which appears to be absent or reduced in the other species. The proximal edge of the juxta is evenly rounded. The female genitalia are unknown to us at present. |
Structural photos |
![](photos_structures/2015/tn9939.00_1449767772.jpg) Male reproductive structures |
![](photos_structures/2015/tn9939.00_1449767808.jpg) Aedeagus |
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Adult ID Requirements: Identifiable from good quality photos of unworn specimens. |
Immatures and Development: Eupsilia larvae are all similar to one another: variable in color; a narrow spiracular stripe usually the most prominent but with other lines also present; a darkened prothoracic shield, usually with two pale stripes. Wagner et al. (2011) recommend that larvae be reared to adulthood in order to determine the species. |
Larvae ID Requirements: Identifiable only through rearing to adulthood. |