Common Name: Great Basin Fritillary, Egleis Fritillary
Fairly common at Donner and very common near tree-line on Castle and Basin Peaks. A fairly small Frit, about the size of S. mormonia, but unlike it found usually in relatively dry sites, often in areas dominated by Lodgepole Pine; adults visit Coyotemint, Aster, thistles, etc. and males both puddle and hilltop. Although this species is famously variable, it shows little variability on our transect. Like all Frits single-brooded (June-October); host plants Viola, species preferences unknown.