. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. MAMMALS OF THE MEXICAN BOUNDARY. 371 ONYCHOMYS PALLESCENS (Merriam). EASTERN DESERT GRASSHOFFEE MOUSE. Onychomys melanophrys pallescens Mbeeiam, North America Fauna, No. 3, Sept. 11, 1890, pp. 61, 62 (original desofiption).—Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, Dec. 27,1901, p. 67 (Syst. Results Study N. Am. Ma
. Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees . Mammals; Mammals; Trees; Trees; Natural history; Natural history. MAMMALS OF THE MEXICAN BOUNDARY. 371 ONYCHOMYS PALLESCENS (Merriam). EASTERN DESERT GRASSHOFFEE MOUSE. Onychomys melanophrys pallescens Mbeeiam, North America Fauna, No. 3, Sept. 11, 1890, pp. 61, 62 (original desofiption).—Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, Dec. 27,1901, p. 67 (Syst. Results Study N. Am. Mam. to close of 1900). [Onychomys leucogaster] pallescens Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 121 (Synop. Mam. N. Am.). 0[nychomys] m[elanophrys] pallescens, Elliot, Field Col. Mus., Zool. Ser., IV, 1904, pp. 165 and 166 (Mam. Mid. Am.). Raton of the Mexicans. Type-locality.—Hopi pueblos, Apache County, Arizona. (Type, skin and skxill, No. ||||, collection of Dr. C. Hart Merriam.) GeograpTiical range.—Sonoran zone of the desert basins of the upper Rio Grande and Little Colorado rivers— the Eastern Desert Tract. Description.—Smaller than 0. long^ ipes or 0. melanophrys. Average measurements of six adults: Length, 159 mm.; tail vertebrae, 51 (to end of pencil, 54); ear above crown, 15; ear above notch, ; length of hind foot, 23. Skull (fig. 61a), 30 by 16. Coloration, very pale; above, pale annulated hairs, becoming paler and grayish on the head and brighter tawny cinnamon, but slightly mixed with black-tipped and black cinnamon on the flanks and rump; palest specimens, light fawn color or 6cru drab above; under surface, feet, and end of tail white; ears bufly white, with a large seal-brown spot on anterior border of convex surface and conspicuous lanuginous tufts at anterior base; dusky stripe on upper side of tail, obsolete. Mammse: P}, A. g, I. | =3 pairs. This desert mouse was found by us only from El Paso, Texas, to the Mimbres Valley, near Monumen
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