1930 ] New Species of Xysticus 133 
Xysticus coloradensis sp. n. (Figs. 1, 3, 7). 
$ 5.5 mm. long. 
Cephalothorax light, mottled brown each side of the 
median light stripe, ending with two pairs of small, dark 
spots on each side surrounded by a clear, cream color; the 
median light stripe with scolloped edges and faint dark 
marks behind the eyes, the usual dark spot at the end of 
the thoracic groove very small ; bristles at the edge of the 
clypeus long; abdomen light with many small irregular 
dark marks with no distinct pattern; abdominal bristles 
long; legs light with many dark spots, light stripe on an- 
terior legs indistinct ; spines, I femur, many long spines on 
upper surface, tibia 4-4, the two middle pairs longer than 
the diameter of the joint, 3 lateral, metatarsus, 4-4, longer 
than diameter of the joint, 4 lateral, tarsus less than one 
half the length of the metatarsus. Cephalothorax as long 
as I femur. Sternum, coxae and venter light with small 
dark dots. 
Palpus. The upper process of the tibia, ending in a 
sharp point under the tutaculum; the middle process pro- 
longed into a large knob, the end covered with small 
bristles, between the upper and middle process is a large 
bristle; the lower process light colored, extending over the 
palpal organ, twisted with a broad tip. On the upper side 
of the tarsus are three long bristles. The tutaculum pro- 
longed into a sharp process covered with curved hairs. 
The upper apophysis of the palpal organ is reduced to a 
small rounded knob; the lower is prolonged into a sharp 
curved point which rests on the outer curve of the tube. 
$ 6 mm. long; cephalothorax 2.5 mm. long, 2.5 mm. 
wide. 
The female has the same markings as the male; the 
scolloped edge of the light stripe is more pronounced. The 
abdomen is spotted and shows a faint serrate median light 
stripe. The legs are spotted and the light stripe faint, 
spines, I tibia, 4-3, the two outer middle ones as long as the 
diameter of the joint, no lateral; metatarsus, 3-3, 2 lateral. 
The tibia is very short, only once and a half the length of 
the patella. Cephalothorax longer than I femur. Sternum 
and venter light with scattered dark spots. 
