. The Canadian field-naturalist. The Canadian Field-Naturalist Vol. 87 tract to Pruitt, (CWS 6869-064). We are grate- ful to Lorna Payne, Harvey Payne and Roger Wilson for assistance in trapping. Methods and Description of Habitats We employed two basic methods in the col- lection of specimens. Pruitt, from 1965 to 1971, trapped standard 1-acre plots with 5,700 trap nights (TN) using Schuyler No. 3 and Museum Special snap traps, (Pruitt, 1966, 1968, 1972). Folinsbee and Riewe in 1967 (3,894 TN), Folinsbee in 1968 (1,201 TN) and Grant in 1968 (267 TN) using Sherman and Longworth live traps. Mus
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. The Canadian field-naturalist. The Canadian Field-Naturalist Vol. 87 tract to Pruitt, (CWS 6869-064). We are grate- ful to Lorna Payne, Harvey Payne and Roger Wilson for assistance in trapping. Methods and Description of Habitats We employed two basic methods in the col- lection of specimens. Pruitt, from 1965 to 1971, trapped standard 1-acre plots with 5, 700 trap nights (TN) using Schuyler No. 3 and Museum Special snap traps, (Pruitt, 1966, 1968, 1972). Folinsbee and Riewe in 1967 (3, 894 TN), Folinsbee in 1968 (1, 201 TN) and Grant in 1968 (267 TN) using Sherman and Longworth live traps. Museum Special, Schuyler, and Victor 4-way snap traps selec- tively trapped various habitats in an attempt to collect as many animals as possible. Figure 1 shows the distribution of trapping sites. Traps were placed in runways, near observed vole sign or spaced in a grid.. Figure 1. Trapping sites on the island of New- foundland utilized between 1965 and 1971 for the capture of Microtus peimsylvanicus ter- raenovae. We trapped five major habitat types: 1. Grassland: treeless habitat with a ground cover dominated by grasses or sedges. We in- clude pastures, hay meadows, fens and sites of abandoned lumber camps in this type. Areas ranged from dry to wet but Sphagnum was never present in significant amounts. 2. Barrens: variable habitat, including al- pine heath and low-growing spruce-fir {Picea mariana and Abies balsamea) "tuckamoor" or krumholz characterized by ericaceous shrubs, mosses and lichens. This habitat type is com- monly found along the exposed coastal regions and ridge tops. 3. Bogs: habitat with substratum of Sphag- num, occasionally a few trees or shrubs such as Picea mariana, Latrix laricina, Ledum gro- enlandicum and Kalmia angusiijolia. We in- clude Carex and Scirpus bogs in this category. 4. Disturbed areas and deciduous woods: in- cluding roadsides, trails, survey lines, cutovers and recent burns. These areas generally lack tree cover. Grass-like vegetat