During the summer of 1985, an intensive effort was made to collect the invertebrates, particularly insects and spiders, of the Wagner Natural Area. This is a 162-ha area 6 km west of the city limits of Edmonton, Alta., on the south side of Highway 16X.
An examination of the spiders collected in the pitfall pans revealed two species of pisaurids, Dolomedes striatus Giebel, 1869, and Dolomedes triton (Walckenaer, 1837). This is the first record of Dolomedes striatus for Alberta. The previous known western limit of its distribution was more or less between Lake Nipigon and Thunder Bay, Ont. (Carico 1973).