The average length of home range for 15 males of _P. truei_ was 363 feet (S. D. 105 ft.); for 22 females of this species 326 feet (S. D. 94 ft.); for 14 males of _P. maniculatus_ 286 feet long (S. D. 94 ft.); and for four females of this species 347 feet (S. D. 83 ft.). The mean lengths of range of males and females differed significantly in _P. maniculatus_, but not in _P. truei_. However, no difference was demonstrable in mean sizes of ranges between males, or between females, of the two species. Distance Between Captures The distance between captures has been used by several investigators as an index of the extent of home range. More short than long distances tend to be recorded when traps are visited at random, and when inner traps of the range are more strongly favored (Stickel, 1954:10). TABLE 3--Summary of Data for Estimated Home Ranges of Mice from a Wild Population. ================+==================+=====+======+============+========= | | | | Estimated | Type of | Species | Sex | No. | home range | ± S. D. Estimate | | | | in sq. ft. | ----------------+------------------+-----+------+------------+--------- Inclusive | _P. truei_ | M | 16 | 47,333 | 19,286 boundary-strip | " " | F | 22 | 40,666 | 17,566 | | | | | | _P. maniculatus_ | M | 15 | 34,222 | 16,000 | " " | F | 5 | 51,333 | 15,913 ----------------+------------------+-----+------+------------+--------- Exclusive | _P. truei_ | M | 16 | 34,333 | 13,266 boundary-strip | " " | F | 22 | 27,199 | 8,820 | | | | | | _P. maniculatus_ | M | 15 | 26,666 | 10,180 | " " | F | 5 | 37,199 | 10,140 ----------------+------------------+-----+------+------------+--------- Adjusted Length | _P. truei_ | M | 16 | 363 | 105 | " " | F | 22 | 326 | 94 | | | | | | _P. maniculatus_ | M | 14 | 286 | 94 | " " | F | 4 | 347 | 83 ----------------+------------------+-----+------+------------+---------