Pœcilochroa variegata.—This is one of the most brightly colored of the family. The cephalothorax is bright orange, a little darker toward the eyes. The abdomen is black, with three transverse white stripes and a T-shaped white mark between the first and second stripes. On the front of the abdomen the white stripes are sometimes tinged with orange. The femora of the first and second legs are black. The distal end of the femur and both ends of the tibia of the fourth legs are black. Other parts of the legs are orange-colored. The female is quarter of an inch long. The cephalothorax is narrower than in Prosthesima atra and Gnaphosa conspersa, and the sternum longer and narrower. The maxillæ [(fig. 10)] are long and widened at the outer corners. The two rows of eyes [(fig. 9)] are almost straight, the upper one longer than the lower.

Pœcilochroa bilineata.—A little smaller than P. variegata, but with the abdomen longer. Cephalothorax and abdomen both white at the sides and in the middle, with two black stripes from the eyes nearly to the spinnerets. The abdomen is covered with long hairs, black in the stripes and silvery white in the light portions. The legs are gray, with white hairs. The under side is light gray, with two black stripes at the sides of the abdomen that do not quite reach the spinnerets. The spinnerets are unusually long. The eyes are arranged as in variegata, the middle eyes being even more distinctly farther apart than they are from the lateral eyes.

Prosthesima atra.—Black, and less than a third of an inch long. It may be mistaken for a small Gnaphosa conspersa, but, besides the small size, the abdomen is usually longer in proportion and the head is narrower than in Gnaphosa. The color is usually a deeper black and less likely to be gray in the young and rusty in the old, but the feet and under side of the abdomen are sometimes yellowish in the young. The eyes [(fig. 14)] are closer together and the two rows more nearly of the same length. In alcohol the cephalothorax and legs are blacker than in Gnaphosa and less brown. The maxillæ [(fig. 15)] are a little longer and less rounded at the outer corners than in Gnaphosa or Pythonissa. The mandibles [(fig. 15)] are without the large teeth under the claw that Gnaphosa and Pythonissa have, and they are turned forward more than in those genera. It lives on the ground and under stones. The cocoon is white or pink, attached by the under surface, with the upper side convex and thickened in the middle, sometimes with a little dirt attached to it.

Prosthesima ecclesiastica.—Black, with white markings along the middle of the back. One-third of an inch long, a little larger than P. atra and smaller than Gnaphosa conspersa. The cephalothorax is proportionally longer and narrower and the sternum narrower and less round than in P. atra [(fig. 18)]. The cephalothorax is dull black at the sides, with a whitish stripe in the middle. The legs are also dull black and, like the cephalothorax, turn brown in alcohol. The abdomen is black, with a bright white stripe in the middle that extends from the front end about two-thirds its length; and at the hinder end, just over the spinnerets, is another white mark [(fig. 17)]. The under side of the abdomen is dark at the sides and light in the middle. The eyes and maxillæ are as in P. atra, the maxillæ a little less rounded at the ends.