Hodges # 6748
Caterpillar foods: alder, buffaloberry (Shepherdia canadensis), Black Cherry, willow (Bugguide)
Pero honestaria, Pero ancetaria, and Pero morrisonia are difficult to differentiate in photos – they need to be dissected to be sure of the correct ID. (Bugguide lists some ways to visually distinguish these species.) The following are my best guesses without dissection.
7/24/2014 Les Ferge has looked at this photo, and this is his best guess on ID without dissection.