This species seems to have, in California, but one generation. It is not common. I have found it only in the latter part of the season, and have not yet succeeded in finding the caterpillar. The genus _Pyrameis_ has the widest range of all the genera of this family. It extends through all latitudes from the Arctic regions to the Cape of Good Hope and Cape Horn. On the northern hemispheres it is best represented in California, which country possesses one peculiar species in addition to all three of Europe and the Eastern Slope of the United States. California. Eastern Slope. Europe. _P. Atalanta._ _P. Atalanta._ _P. Atalanta._ _P. Carye._ —— —— _P. Cardui._ _P. Cardui._ _P. Cardui._ _P. Hunteri._ _P. Hunteri._ —— JUNONIA Hubn. _Junonia Cænia_ Boisd. et Lee. Several generations. Caterpillar not yet found in California. From this enumeration of California _Vanessidæ_ we find, 1st. That with the exception of _V. Californica_, there is not yet found any species of this group peculiar to our State, for even _P. Carye_ exists as well in Chili as here, and is also said to have been found in Brazil. This circumstance is more striking since our _Argynnidæ_ and _Meliteæ_ prove altogether local; none of them being identical with Eastern species, unless a _Melitæa_, of the type of _Mylitta_, should be found identical with a form found in Texas. 2. The genera of this group, north of the Tropic of Cancer, are essentially amphigeic, the European _Arachnia_ being almost the sole exception. But, as it were, to compensate this, the tropical amphigeic genus _Junonia_, wanting in Europe, extends, on our continent, to high latitudes. 3. As regards the number of specks, the genus _Grapta_ predominates at the Eastern Slope, _Vanessa_ in Europe, _Pyrameis_ in California, and our own _Junonia_ is counterbalanced in Europe by our _Arachnia_. FAM. LIMENITIDÆ. LIMENITIS Fabr. _Limenitis Lorquini_ Boisd. Like its congeners in other parts of the world, this species occurs in shady woods, or on the banks of arroyos. It is peculiar to California and Oregon. _Limenitis Eulalia_ Doubleday. In localities similar to the preceding species. These two species are, as yet, the only ones found in our State. They represent a peculiar type, forming, in their coloration, a transition from _Limenitis_ to the South American genus _Heterochroa_. Neither of these Californians have been found on the Eastern Slope. _L. Eulalia_ extends to Mexico. The family _Apaturidæ_ as yet, has not been found in California. Dr. Trask offered the following article: Earthquakes in California During the Year 1863. BY JOHN B. TRASK, M.D.