i'KTS Vol. 79, pp. 49-52 23 May 1966 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON FIRST RECORD OF THE PIGMY SHREW IN WYOMING AND DESCRIPTION OF A NEW SUBSPECIES (MAMMALIA : INSECTIVORA) By L. N. Brown Department of Zoology and Physiology, University of Wyoming, Laramie While trapping shrews in the Medicine Bow Mountains of southeastern Wyoming, I took several specimens of the pigmy shrew (Microsorex hoyi Baird). Two males were captured during the early fall of 1963 and five females were taken during the summer of 1964. These specimens are as follows: #K-307, adult male, 80-28-9, 30 September 1963; #K-315, adult male, 78-28-9, 2 November 1963; #K-420, adult female, 78-25-9, 17 July 1964; #K-423, adult female, 87-31-9, 21 July 1964; #K-451, juvenile female, 77-26-9, 30 July 1964; #K-471, adult female, 85^28-10.5, 20 August 1964; #K-472 adult fe-male, 87-29-9.5, 24 August 1964. As far as can be determined, these specimens represent the first valid records of the genus Microsorex in Wyoming. The trapping locality is at Trail's Divide Pond, %-mile south of the University of Wyoming Summer Science Camp on State Highway 130, Centennial, Albany Co., Wyoming. Gallon cans were buried in a boggy area of sphagnum moss and sedge bordering the pond on 20 September 1963. This area is surrounded by a relatively dry stand of Engelmann Spruce (Picea engelmannii) and alpine fir (Abies lasiocarpa). The elevation of the pond and bog is exactly 10,000 feet above sea level. The nearest record of Microsorex is from a locality 41 miles west of Ft. ColMns, Larimer Co., Colorado, recently reported by Pettus and Lechleitner (1963: 119). This is approximately 60 air miles southeast of the Wyoming locality and in the same range of mountains. The Colorado specimens were recorded 7— Proc. Biol. Soc. Wash., Vol. 79, 1966 (49) SWITHSONIAI^
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