Heterocampa guttivitta
Hodges #7994
Probably 3rd or 4th Instar
See the following article for more information
http://www.fs.usda.gov/Internet/FSE_DOCUMENTS/fsbdev2_043574.pdf
Nikon D300S
,AF-S Micro Nikkor 105 mm f2.8 1/80s f/18.0 at 105.0mm iso800
full exif