County. (4) 3 mi. E, 9 mi. S Collbran, 10,200 ft., Mesa County. (5) 5-1/2 mi. E, 11-1/2 mi. S Collbran, in Delta County. (6) 5-1/2 mi. E, 12 mi. S Collbran, 9600 to 10,400 ft., in Delta County. (7) 28 mi. E Grand Junction (Sec. 29, T. 11S, R. 95W), Mesa County. (8) 6 mi. E Skyway, 10,000 to 10,500 ft., in Delta County. (9) 7 mi. E Skyway, in Delta County. (10) 8 mi. E, 1/2 mi. S Skyway, 9500 to 10,200 ft., in Delta County. (11) 8 mi. E, 3/4 mi. S Skyway, 10,200 ft., in Delta County. (12) 8 mi. E, 1 mi. S Skyway, 10,000 to 10,200 ft., in Delta County. (13) 8 mi. E, 1-1/2 mi. S Skyway, 8500 to 9600 ft., in Delta County. (14) 8 mi. E, 2 mi. S Skyway, 9000 ft., in Delta County. (15) 8 mi. E, 2-1/2 mi. S Skyway, 9600 ft., in Delta County. (16) 1 mi. S, 4 mi. W Skyway, 10,200 ft., Mesa County. " title="Fig. 1. Map of the Grand Mesa (for purposes of this paper the area above 7500 feet on each side of the northern boundary of Delta County). The inset of the western three-fourths of Colorado shows the Grand Mesa in relation to the larger areas of mountains in the state (areas above 9000 feet are stippled). The following collecting localities are indicated by numbered, black dots: (1) 2 mi. N, 9 mi. E Collbran, 7000 ft., Mesa County. (2) Land's End Road to Grand Mesa, 6800 to 8050 ft., Mesa County. (3) 3 mi. E, 4 mi. S Collbran, 6800 ft., Mesa County. (4) 3 mi. E, 9 mi. S Collbran, 10,200 ft., Mesa County. (5) 5-1/2 mi. E, 11-1/2 mi. S Collbran, in Delta County. (6) 5-1/2 mi. E, 12 mi. S Collbran, 9600 to 10,400 ft., in Delta County. (7) 28 mi. E Grand Junction (Sec. 29, T. 11S, R. 95W), Mesa County. (8) 6 mi. E Skyway, 10,000 to 10,500 ft., in Delta County. (9) 7 mi. E Skyway, in Delta County. (10) 8 mi. E, 1/2 mi. S Skyway, 9500 to 10,200 ft., in Delta County. (11) 8 mi. E, 3/4 mi. S Skyway, 10,200 ft., in Delta County. (12) 8 mi. E, 1 mi. S Skyway, 10,000 to 10,200 ft., in Delta County. (13) 8 mi. E, 1-1/2 mi. S Skyway, 8500 to 9600 ft., in Delta County. (14) 8 mi. E, 2 mi. S Skyway, 9000 ft., in Delta County. (15) 8 mi. E, 2-1/2 mi. S Skyway, 9600 ft., in Delta County. (16) 1 mi. S, 4 mi. W Skyway, 10,200 ft., Mesa County. " tag="{http://www.w3.org/1999/xhtml}img"/> Fig. 1. Map of the Grand Mesa (for purposes of this paper the area above 7500 feet on each side of the northern boundary of Delta County). The inset of the western three-fourths of Colorado shows the Grand Mesa in relation to the larger areas of mountains in the state (areas above 9000 feet are stippled). The following collecting localities are indicated by numbered, black dots:

  (1) 2 mi. N, 9 mi. E Collbran, 7000 ft., Mesa County.
  (2) Land's End Road to Grand Mesa, 6800 to 8050 ft., Mesa County.
  (3) 3 mi. E, 4 mi. S Collbran, 6800 ft., Mesa County.
  (4) 3 mi. E, 9 mi. S Collbran, 10,200 ft., Mesa County.
  (5) 5-1/2 mi. E, 11-1/2 mi. S Collbran, in Delta County.
  (6) 5-1/2 mi. E, 12 mi. S Collbran, 9600 to 10,400 ft., in Delta County.
  (7) 28 mi. E Grand Junction (Sec. 29, T. 11S, R. 95W), Mesa County.
  (8) 6 mi. E Skyway, 10,000 to 10,500 ft., in Delta County.
  (9) 7 mi. E Skyway, in Delta County.
(10) 8 mi. E, 1/2 mi. S Skyway, 9500 to 10,200 ft., in Delta County.
(11) 8 mi. E, 3/4 mi. S Skyway, 10,200 ft., in Delta County.
(12) 8 mi. E, 1 mi. S Skyway, 10,000 to 10,200 ft., in Delta County.
(13) 8 mi. E, 1-1/2 mi. S Skyway, 8500 to 9600 ft., in Delta County.
(14) 8 mi. E, 2 mi. S Skyway, 9000 ft., in Delta County.
(15) 8 mi. E, 2-1/2 mi. S Skyway, 9600 ft., in Delta County.
(16) 1 mi. S, 4 mi. W Skyway, 10,200 ft., Mesa County.

Sorex vagrans obscurus Merriam.—Fifteen specimens of the Vagrant Shrew (59645-59655, 59665-59668) were trapped in Delta County from localities 6, 10, 12, 13, and 14. The fourteen specimens having skulls fell into two distinct age-classes based on wear of the teeth as described