(8) Argynnis rhodope Edwards. [Plate XVI], ♀ under side (Type) (Rhodope).
The wings of the two sexes are quite alike on the under side. On the upper side, which we do not figure, the wings are bright fulvous, dark at the base, marked with heavy, black, confluent spots. Expanse 2.2 to 2.4 inches.
Found in Washington and British Columbia.
Genus BRENTHIS Hübner
(The Little Fritillaries).
Small or medium-sized butterflies, closely resembling those of the genus Argynnis. The chief difference is that in Brenthis only the first subcostal nervule branches off before the end of the cell, while in Argynnis the first and second are thus given off; palpi not so stout as in Argynnis; the basal spur of the median vein of the fore wing, found in Argynnis, is wanting in Brenthis. Eggs subconical, twice as wide as high, truncated, vertically ribbed. Caterpillars like those of Argynnis, but smaller, and often lighter in color, feeding on violets. Chrysalis pendant, about 0.6 inch long; two rows of conical tubercles on back.
Sixteen species are found in North America, all of which but two are subarctic or occur on high mountains.
PL. XVII
(1) Brenthis myrina (Cramer), [Plate XVII], Fig. 1, ♂, upper side; Fig. 2, ♂, under side (The Silver-bordered Fritillary).
Well depicted in the figures we give. Expanse 1.40-1.70 inch. Eggs pale greenish yellow. Caterpillar, when fully grown, about 0.87 inch long, dark olive-brown, marked with lighter green, and covered with spiny, fleshy tubercles. Chrysalis yellowish brown marked with darker brown spots, some having a pearly lustre.