To the diagnosis formerly given I add the following character:
Margo anterior alarum anteriorum subtus quam disco pallidior.
The saturated coloration of the radical half of the hind wings, is not always equal in its extent beyond the middle macular fascia, so that the diagnosis of No. 9 is in some respects near enough to cause confusion, if it were not that in No. 9 the anterior margin of the forewings is always decidedly darker than the disk, furnishing a good diagnostic character. In general aspect they differ enough to be recognized at the first glance, but it is very difficult to describe the other differences.
The name I propose for No. 6, is derived from its inhabiting the steep rocky declivities characterizing the lower part of the Sierra. The specimens were collected by Prof. Brewer at a moderate elevation above the sea.
4. Argynnis monticola, Behr, n. sp. [No. 8 of the former article.]
This species was found in Yosemite Valley and some other localities, being apparently not rare.
5. Argynnis Antithore, Boisd.
One specimen only from Yosemite Valley.