Abstract

This group of spiders, here designated as the bennetti group of Amaurobius, comprises those North American species which group around Amaurobius bennetti (Blackwall). In these species, the epigynum has a pair of large lateral lobes which converge posteriorly around a small ovoid median lobe. The male has three distinct spurs on the tibia of the palpus, at the distal end above. The more detailed characteristics of this group are as follows:

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