Naphrys pulex

The species was first described as Attus pulex by Nicholas Marcellus Hentz in 1846. It was later placed in a number of other genera, including Habrocestum, until a review of that genus in 1981 placed it in Naphrys.^[1][2]

Males have a total length of around 4 mm (0.2 in) of which the carapace makes up about 2 mm (0.08 in). The fourth leg is longest, followed by the third, first and second. The general coloration is described as "cryptic". There is a yellowish bar-shaped mark on the abdomen. The legs have spots and rings. Females are longer than males, with a total length of 4.6 to 6.1 mm (0.18 to 0.24 in), with a carapace 2.0 to 2.4 mm (0.08 to 0.09 in) long. Females have a similar coloration to males, but less distinct. The larger size and the shape of the male palpal bulb distinguish this species from others, such as Naphrys acerba.^[2]

Naphrys pulex is native to Canada and the United States,^[1] where it is found mainly in the east. It has been observed on walls, grass and litter, on the ground, and on tree trunks.^[2]

Naphrys pulex feeds mainly on ants.^[3]