Several years ago the writer received, for determination, several specimens of a species of Coenonympha from Oregon. These specimens turned out to be Coenonympha ampelos Edwards. They were taken in August. Comparing these August specimens with a large series of specimens taken during the latter part of May and early June, I found that the two broods of ampelos were different. The summer brood was slightly lighter in color and much browner, with very little of the dark powdering found on the underside of the secondaries in the spring brood.