Naphrys pulex
Naphrys pulex is a species of spider from the family Salticidae that is widely distributed in Canada and the United States. Description
Males have gray and black mottling on the top of their cephalothorax, abdomen, and legs, with orange coloration around the sides of the cephalothorax. Habitat
The species can be found in tall grass prairies and wooded areas. It is very common in mesic hardwood forests, where there is plenty of leaf litter. Finding this species in buildings, on bark or outcrops is also likely. The species feed on primarily ants and other arthropods. References

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Salticidae
Spiders of Canada
Spiders of the United States
Spiders described in 1846