$Pœcilochroa variegata.$--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. [Illustration: FIG. 12. FIG. 13. Pœcilochroa bilineata.--Upper and under views of female without the legs, enlarged four times.] $Pœcilochroa bilineata.$--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. [Illustration: FIGS. 14, 15, 16. Prosthesima atra.--16, female enlarged four times. 14, eyes seen from in front. 15, maxillæ, labium, and ends of mandibles from below.] $Prosthesima atra.$--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. [Illustration: FIG. 17. FIG. 18. Prosthesima ecclesiastica.--Upper and under views of female enlarged four times.]