114 The Mammals of Colorado 
Mesa counties. This indicates a rather pecuhar distribution along 
the east base of the mountains, and probably up the Arkansas to 
Salida. The gap between here and the western counties is yet 
to be filled in, but it seems likely it will be found along the Sangre 
FIG. 37. bailey's wood-rat. FEMALE WITH TWO YOUNG 
From life, Herman W. Nash, Photo. 
de Christo Range, and across at least the southern part of the San 
Luis Valley, and thus make a connection with the western localities. 
The species has a vertical range from 8,000 feet down to 4,600 
feet, this last being the altitude at Grand Junction, where, however, 
it did not seem to be very common, though A'', orolestes was 
abundant. 
Habits. — Wherever I have found it this species was hving 
among the rocks with habits as in the other species. 
At Coventry and Bedrock, Montrose County, it was 
breeding in April, and the htters seemed to be small, two or 
three in each. In fact, so far as my observations go the 
round-tailed wood-rats are not as prolific as the bushy-tailed 
species. 
