Trachelas ruber.—One-third of an inch long, with the cephalothorax short and wide like Clubiona, and the deep orange-brown color of Dysdera. The cephalothorax is almost as wide as long, and widest opposite the second legs. The head is three-quarters as wide as the thorax and as high in the middle halfway between the eyes and the dorsal groove. The front of the head is low, as in Clubiona. The front row of eyes is a little curved, so that the middle pair are half their diameter higher than the lateral. The upper row is much longer and the lateral eyes are farther from the middle than these are from each other. The labium and maxillæ are like those of Clubiona and the palpi very slender. The first pair of legs are thicker than the others and as long as the fourth. The second pair are also somewhat thickened. The legs are orange brown, darkest on the front pair. The cephalothorax is dark brown and finely roughened over the whole surface, without hairs except in front. The abdomen is pale, with no markings except over the dorsal vessel and the muscular spots. Some light-colored individuals have all the colors paler. Under stones and leaves.

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

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.