I confess I can not find any constant mark of difference between this species and _S. Alope_, _Nephele_, and _Pegala_, however different at first glance their forms may appear. I am very much inclined to consider them local aberrations of one far spread species, that gradually slopes from _S. Pegala_ Fabr., through _S. Ariane_ Boisd. to _S. Nephele_ and _S. Alope_ Fabr., in a similar way as the Gerontogeic _P. Egeria_ L. looks very different from its African form _P. Xiphia_ Fabr., with which, nevertheless, it is insensibly united by its intermediate form _P. Meone_. All my Californian specimens agree perfectly with Dr. Boisduval’s diagnosis of _S. Ariane_; with the exception of one that approaches to _S. Pegala_, by its having only one eye-mark on the upper side of the anterior wings, but differs by the entire absence of the wide rusty band on the same. The specimen was among several undoubted _S. Ariane_, caught near Mono Lake, by Prof. Brewer, of the State Geological Survey. Besides the above mentioned locality, I received specimens from San Diego and Santa Cruz. Near San Francisco the species is wanting. As to _S. Sthenele_ and _S. Sylvestris_, I entertain no doubts regarding their rights as distinct species, but _S. Boopis_ being only distinguished by the absence of the series of eyes on the under side of the hind wings from _S. Nephele_, may, perhaps, prove a local variety or aberration of that most polymorphous and far spread species _S. Alope_. In the mean time, until the connecting forms are found, I consider it to be specifically distinct. COENONYMPHA Hubner. _C. Galactina_. Boisd. I consider this species as identical with _C. Californica_ Dbld. At least I find in a long series of specimens, no point where _Californica_ ends and _Galactina_ begins. _C. Galactina_, according to Boisduval, exists also in Kamtschatka. In California it is one of the commonest species of Diurnals, and is found in the most different localities, in several generations throughout the year. There exists a second _Cœnonympha_ in some sequestered valleys of the Northern Sierra, that approaches in its coloration, the European _C. Pamphilas_. I have only seen one pair of this species, and not possessing it, I can not give a diagnosis. It may be that it is identical with _C. Inornata_, Edw., or _C. Ochracea_, Edw., or some other Northern species. Extratropical America is not rich in _Satyrides_, if compared to the same latitudes in Europe or Asia, and California is especially poor. EUROPE. CALIFORNIA. _Arge_, —— _Erebia_, —— _Chionobas_, _Chionabas_, _Satyrus_, _Satyrus_, _Pararga_, —— _Epinephele_, —— _Cœnonympha_, _Cœnonympha_.