Idia americalis - American Idia, a very common visitor to Allen Acres. Caterpillars reported to eat Angelica atropurpurea (Apiaceae), Hedysarum (Fabaceae), Picea amd Pseudotsuga menziesii (both in the Pinaceae). Interesting that none of these four plants are in the area. But, it is also reported to eat lichens, which are.