Females are distinguished from ssp. fossulana
by their broader abdominal bands. The band on the third The bands on the sternite
has a deep impression in the middle, with the outer regions forming two projecting lobes.
Males are distinguished from ssp. fossulana
by the broader band on the third abdominal segment. The bands on the sternites
are more widely interrupted. The background of the tergum
has greenish, rather than blueish, reflections.
This subspecies is separated geographically from ssp. confluenta. Ssp. plumipes is restricted to the Austral life zone (eastern US from North Carolina to around the southeasternmost part of New York) whereas ssp. confluenta is found in the plains region.
Austral life / east of the Appalachians (DE, MD, NC, NJ, VA)
Ssp. plumipes is the most similar but is more widespread in the plains region.