The Canadian Entomologist, Vol. XII., No. 2, February 1880

This paper offers a meticulous look at two familiar Satyrus butterflies, Nephele and Alope, whose wing patterns range from uniform brown to striking yellow‑banded forms. By comparing historic descriptions with fresh field notes, the author traces how the darker male typical of Nephele blends gradually into the paler Alope, especially around the eye‑spot “glory” that gives each species its name. The discussion highlights the stark north‑south divide: Nephele dominates the Canadian provinces and northern New England, while Alope thrives further south, with a narrow transition zone threading through the White Mountains and beyond.

Drawing on a network of lepidopterists from Ontario to Michigan, the article maps sightings, specimen exchanges, and regional anecdotes that reveal pockets where both forms coexist or where one is entirely absent. These observations suggest a complex mosaic of habitats and climate influences shaping the distribution, leaving open questions about how abrupt or gradual the boundary truly is. Listeners will gain a vivid sense of 19th‑century scientific collaboration and the nuanced world of butterfly variation across eastern North America.