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. MELITÆA, Fabr. It will be necessary to give a monograph of this genus before we go on with the enumeration of the mountain species. We have in California _eleven_ well-marked species, a number far exceeding those of the Atlantic Slope, and about equal to those of the whole of Europe. In the “Synopsis of North American Lepidoptera,” written for the Smithsonian Institution by John G. Morris, I find only two Californian species mentioned and described, viz.: _M. Editha_ and _M. Palla_, the “_M. Zerene_” of the same work being without doubt an Argynnis. In a catalogue published by the same author in 1860, I find besides those just mentioned another, viz; _M. Chalcedon_. Dr. Boisduval names several Melitæa in his letters to me, but gives no diagnosis. Our Californian Melitæa belong to four types. TYPE I. The first is that of _M. Tharos_, represented by four distinct species in California. This type is peculiar to the American Continent, occurring also in the Atlantic States, and in the tropics. TYPE II. That of _M. Athalia_, represented by _M. Palla_, and several others. It is also abundantly represented in Europe, but seems to be wanting in the Atlantic States. TYPE III. That of _M. Phaeton_, corresponding exactly to the European, _M. Maturna_, _M. Artemis_, etc., is represented in California by _M. Editha_, _M. Chalcedon_, and others. TYPE IV. That of _M. Leanira_ is numerous in the tropics of America but seems to be wanting everywhere else except in California. MELITÆA, Type I. 1. _M. montana_, Behr. Syn? _M. Pyrrha_, Doubleday.