Silvery Checkerspot - Chlosyne nycteis
Lewis County, West Virginia, USA
July 27, 2020
This was identified on iNaturalist by Kurt Lehman and JR Cagle here: https://www.inaturalist.org/observations/60529127) as Silvery Checkerspot (Chlosyne nycteis).
Looks like photo of same on p. 127, "Caterpillars of Eastern North America" by David L. Wagner.