Both sexes are described for the species pair of crab spiders, Xysticus durus (Soerensen) and X. keyserlingi Bryant. A recent collection of keyserlingi from the Alpine Garden, Mt. Washington, New Hampshire reveals that the male of X. leechi Turnbull et al. has been misidentified as that of durus, the male of durus has been confused with that of keyserlingi, and the name leechi must become a junior synonym of the name keyserlingi.
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