Type.—Male, adult, skin and skull; No. 81830, K. U.; from 4 mi. E Sedan, Chautauqua County, Kansas; obtained on December 30, 1959, by C. A. Long, original No. 456.

Range.—Known from 3 mi. W Cedar Vale, in Cowley County, Kansas, and from the type locality.

Diagnosis.—Size medium (see Table 1 beyond); underparts white; upper parts Ochraceous-Tawny laterally, becoming intermixed with black and approaching Mummy Brown dorsally (capitalized color terms after Ridgway, 1912); eye nonprotuberant; tail short but well-haired distally and usually less than half total length; nasals long; cranium large.

Comparisons.—From P. b. attwateri, the subspecies geographically nearest cansensis, the latter can be easily distinguished by the less protuberant eyes and relatively shorter tail (91 per cent of length of head and body; in topotypes of P. b. attwateri from Kerr County, Texas, 104 per cent; in specimens of P. b. attwateri from Cherokee County, Kansas, 103 per cent). P. b. cansensis is darker than P. b. attwateri and darker than P. b. rowleyi, the palest subspecies of brush mouse, which occurs to the westward. The skull and nasals (see Table 1) in adults of P. b. attwateri from Cherokee County average shorter than in cansensis.

Specimens examined.—Total, 26. Cowley Co.: 3 mi. W Cedar Vale, 16. Chautauqua Co.: type locality, 10.

Table 1. Average and Extreme Measurements of Specimens of P. b. cansensis, of P. b. Attwateri From Cherokee County, Kansas, and of Topotypes of P. b. attwateri Listed by Osgood, 1909.

P. b. cansensisP. b. attwateri
Three miles west
of Cedar Vale		Type locality Both localitiesTwo miles south
of Galena		Type locality[A]
No. specimens117182010
Total length180.5
170-199		176.7
166-188		179.1
.....		186.2
170-210		196.0
.....
Tail-vertebrae85.5
72-101		85.0
75-93		85.3
.....		94.5
83-104		100.0
.....
Hind foot23.1
22-24		23.6
22-25		23.3
.....		23.8
22-25		21.0
.....
Ear from notch18.2
17-19		19.1
18-21		18.5
.....		18.4
14-21		.....
.....
Greatest length of skull27.9
26.8-29.0		28.3
27.9-28.9		28.1
.....		27.8
26.6-29.1		.....
.....
Length of nasals10.4
9.9-10.8		10.2
9.5-10.7		10.3
.....		9.9
9.1-10.4		.....
.....
Zygomatic breadth14.3
13.9-15.0		13.5
13.0-13.9		13.9
.....		13.8
13.3-14.4		.....
.....

[A] From Turtle Creek, Kerr County, Texas, after Osgood (1909:148).

Distribution of Peromyscus boylii in Kansas

The subspecies Peromyscus boylii attwateri is known in the state only from Cherokee County, the southeasternmost county in the state. Probably the only locality where the brush mouse occurs in that county is on the systems of cliffs along Shoal Creek, southward from Galena, to the eastward of Baxter Springs. This is the extent of the known range, and in my opinion the probable range, of P. b. attwateri in the state (see Fig. 1). Cockrum (1952:fig. 49) by mistake mapped the species from west of Baxter Springs in Cherokee County.