At the first look the difference between this species and M. Palla is striking enough, for the coloration of the upperside is quite different and the reticulate black marking runs in much thinner lines and is more regular than in M. Palla, where towards the margin the black markings unite more or less and cover the ground color. The striking alteration in the colors of the upper side in the series of M. Palla does not exist here and the female is sometimes quite like the male. Sometimes the ground color alternates transversely with a slightly diluted tint, and for the female this character would be sufficient. But both sexes differ in the constant absence of the eye-spots of the submarginal band.
I received this species from the headwaters of the Tuolumne River where it was collected during the stay of the State Geological Survey in the elevated and uninhabited regions. I take this opportunity of showing my respect for Prof. Whitney and the other members of that learned party, to all of whom I am under obligations for the kindness with which, under all kinds of hardships, they collected materials for a Fauna of our Californian Lepidoptera.
3. M. Gabbii, Behr, n. sp.
Alae maris supra ut in M. Palla, feminae fasciis transversis alternantibus luteis et fulvis totae nigro clathratae.
Alae inferiores ut in M. Palla, sed maculae radicales candidae pruinaque argentea renitentes ita ut fascia intermedia lunulaeque marginales. Fasciae, maculae, et margo aurantiacae ordinariae. Fasciae submarginalis spatium, quae non occupatur lunulis aurantiacis, sulphureum.
I received this species from the mountains near Los Angeles and have seen a series of specimens constantly showing the same characters. This description I made from a pair kindly communicated to me by Mr. Lorquin.
4. M. Hoffmanni, Behr, n. sp.
Alae et maris et feminae a radice usque ad medium nigrae hinc et illinc maculis luteis fulvisque obsitae, a media ala luteae marginem versus fulvescentes plus minus nigro clathratae.
Alae inferiores subtus ut in M. Palla, sed fascia submarginalis inter lineas undulatas nigras, non lunulis sed punctis omnino rotundis constituta.
This species is less rare than the two preceding. Nevertheless it has not yet been found near San Francisco and seems peculiar to the higher regions of California.