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Field Guide Descriptions: Covell (1984); Beadle and Leckie (2012) | Online Photographs: MPG, BugGuide, GBIF, BOLD | Technical Description, Adults: Forbes (1960) | Technical Description, Immature Stages: Forbes (1960); Wagner (2005) | |
| Adult Markings: Larger but similar in coloration to both Pygarctia abdominalis and Pagara simplex, with wings predominantly gray and abdomen yellow or orange with a mid-dorsal row of black dots. Apart from the abdomen, egle is completely gray, lacking the yellow or orange marks on the head found in both abdominalis and simplex and also lacking the similarly colored marks found on the thorax of abdominalis. |
| Adult ID Requirements: Identifiable from good quality photos of unworn specimens. |
| Immatures and Development: The larvae are very distinctively marked tussock caterpillars, with orange tufts running down dorsally and subdorsally along the abdomen, flanked with black tufts laterally, and with longer black and white pencils located at both ends of the body. The larvae of Lophocampa maculata are similar in color but have yellow on the sides of the abdomen and a row of mid-dorsal black tufts running down the middle of the back; maculata also lacks the black pencils at the ends of the body. |
| Larvae ID Requirements: Identifiable from good quality photos, especially where associated with known host plants. |