$Chiracanthium viride.$--This has the color and general appearance of the Clubionas, but the legs are longer and the first legs are considerably longer than the fourth. The body is shorter and the abdomen is wider and thicker in the middle. The female (fig. 67) is a third of an inch long and the front legs two-fifths of an inch. The eyes (fig. 68) are arranged as in Clubiona. The maxillæ and labium are like those of Clubiona, but the sternum is shorter and rounder. The head is but little narrowed and the eyes cover almost its whole width. The upper spinnerets are longer than the lower and distinctly two-jointed. The spines of the legs are small and inconspicuous. The color in life is greenish white, the mandibles brown, and the stripe over the dorsal vessel darker than the rest of the abdomen.
The male has the front legs nearly three times as long as the body, though the other legs are not much longer than in the female. The mandibles are also elongated, as in the males of Clubiona. The male palpi have the tarsus long, with a pointed process that extends backward over the tibia between two processes on that joint.
The Dysderidæ are a small family of spiders resembling in their general appearance the Drassidæ, but differing from them in several important characters. They have only six eyes instead of the usual eight, and they have four breathing holes in the front of the abdomen, two of them leading to the usual lungs and the others to the air-tubes, which in most spiders open just in front of the spinnerets.
[Illustration: FIGS. 70, 71, 72. Dysdera interrita.--70, enlarged four times. 71, head and eyes from in front. 72, under side enlarged six times.]
$Dysdera interrita.$--Six eyes close together on the front of the head. Length half an inch, with the abdomen a little longer than the cephalothorax. The coxæ and patellæ are unusually long, especially on the front legs, and the tarsi are unusually short (fig. 70). The mandibles are long and inclined forward. The maxillæ are long, a little widened in the middle and pointed at the ends. The labium is long and narrow, and forked at the end (fig. 72). The skin around the base of the legs is thick and hard, so that the sternum appears to extend between them (fig. 72). There are two tracheal openings just behind the openings of the lungs. The cephalothorax and legs are orange brown, darker toward the front. The abdomen is the same color, but so pale as to be almost white.