. Bulletin - United States National Museum. Science. 272 BULLETIN 56, UNTTED STATES NATIONAL MUSEUM. ), killed August 31, 1893, had completed the post-breed- ing coal. An immature female (Xo. 581)01 ), September 7. 1893, is in complete summer pelage and of a brighter orange-buff than any other in the scries. In this specimen the permanent pre- molar is just replacing its predecessor and the squirrel is two-thirds grown. The three remaining specimens (adults: September 5 to 29, 1893) illustrate the au- tumnal change. Measurements (average by 37 mm. in X. rufi- venter against *'&
. Bulletin - United States National Museum. Science. 272 BULLETIN 56, UNTTED STATES NATIONAL MUSEUM. ), killed August 31, 1893, had completed the post-breed- ing coal. An immature female (Xo. 581)01 ), September 7. 1893, is in complete summer pelage and of a brighter orange-buff than any other in the scries. In this specimen the permanent pre- molar is just replacing its predecessor and the squirrel is two-thirds grown. The three remaining specimens (adults: September 5 to 29, 1893) illustrate the au- tumnal change. Measurements (average by 37 mm. in X. rufi- venter against *'>;> by 37 in A. apache). It is low, flat- tened superiorly, with the nasals very Hat: rostrum rather high; audita! bullae much larger than in S. rufi- venter; incisive foramen and interpterygoid fossa long, as in the fox squirrel group. Habits dud local distribution.—Dr. A. K. Fisher collected a speci- men of the Apache squirrel in the Chiricahua Mountains, south- eastern Arizona. I have only seen it in the San Luis Mountains, in the vicinity of Monument No. 65, where it ranged from to 2,100 meiers in altitude. Nests were seen in the oak /one from 1,700 to 1, meters. It was not. observed at the summit. Its favorite food appeared to be the acorn of Quercus hypoleuca, and most of the nests were placed in trees of that species. A female shot in Tur- key Canyon. San Luis Mountains, Chihuahua, Mexico. July 11, L892, contained 3 fetuses, whose envelopes measured •">1, inches in greatest diameter. Its habits reminded me much of those of the fox Fig. 43.—Sciurus apache. San Luis Mountains, near Monument No. 65. (Cat.'No. 35692, ) a, Dor- sal view; /), VKNTAL VIEW; C, LATERAL Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsoni
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