candidate IDs
Acrolophus griseus:
https://bugguide.net/node/view/617098
http://mothphotographersgroup.msstate.edu/species.php?hodges=355
Walsingham's description: https://www.biodiversitylibrary.org/page/13718521#page/178/mode/1up
Not much different from arizonellus
https://bugguide.net/node/view/825171
http://mothphotographersgroup.msstate.edu/species.php?hodges=341
description: https://www.biodiversitylibrary.org/page/7757282#page/658/mode/1up
Acrolophus sinclairi is also similar at first glance:
http://mothphotographersgroup.msstate.edu/species.php?hodges=382
However, the species description gives the ground color as ochreous:: https://www.biodiversitylibrary.org/page/7757717#page/725/mode/1up