A, curvata usually has black hairs and a black head. The caterpillar of A . canescens usually has purely brown hairs and a brown head.. The caterpillar of A, glatignyi typically has black hairs on the thorax, and brown on the abdomen, and a brown head.
Donhe Thank you for confirming ID and providing an explanation of the differences between the 3 species. And thank you to everyone else for your comments also.