VOL. XI, PP. 71-72 APRIL 21, 1897 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON DESCRIPTIONS OF TWO NEW RED BACKED MICE (EVOTOMYS} FROM OREGON. BY C. HART MERRIAM. The field parties of the U. S. Biological Survey, while at work iu the southern part of the Cascade Range in Oregon last sum mer, obtained two undescribed species of Evotomys. The first of these was found in the Hudsonian zone at Crater Lake, on top of Mt. Mazama; the other in the Transition zone of the Rogue River Valley at Prospect, at the west base of Mt. Mazama. The Crater Lake animal, named E. mazama after the moun tain on whose summit Crater Lake is situated, is an alpine species and seems to be very distinct from any heretofore de scribed. It was also found by us on Mt. Hood. The affinities of the Rogue River animal seem to be in the direction of E. cali-fornicus. The new species may be known from the following descrip tions : Evotomys mazama sp. nov. Type from Crater Lake, south end of Cascade Range, Oregon. No. 79913, $ ad., U. S. Nat. Mus., Biological Survey collection. Altitude 7000 feet [2130 meters]. Collected August 15, 1896, by C. Hart Merriam and Vernon Bailey. Original No. 5765. General characters. Size rather large; tail long for &n Evotomys; ears medium or rather short ; coloration rather pale ; dorsal area relatively pale and not well denned. Color. Sides of head and body, and head from nose to forehead, pale gray or grayish ash ; dorsal area pale dull chestnut, varying to pale rusty ; under parts buffy white, the plumbeous under fur showing through ; 16-BioL. Soc. WASH., VOL. XI, 1897 (71)
BioStor
