Zygoballus bettini.—This is a very beautifully colored spider, having in life spots of white hairs and shining scales of the color of copper and bronze. The cephalothorax of both sexes is high and wide in the middle and slopes down steeply from the posterior eyes under the front of the abdomen [(fig. 132)]. The top of the cephalothorax between the eyes is nearly square. The posterior eyes are almost the full width of the cephalothorax apart, and the front row of eyes is nearly as long. The cephalothorax is dark brown covered with iridescent scales. The legs are pale, except the dark femora of the first pair and dark spots on the ends of the joints of the fourth pair. In the male all the legs are a little darker than in the female and without the spots on the fourth leg. The abdomen of the female is light brown, marked with white in a row of irregular spots. In the male the abdomen is brown, covered with shining scales and with a white band around the front and two white spots on each side. The mandibles of the male are much elongated and bent apart at the ends to make room for the long claw. At the inner angle is a large tooth, and there is another one of complicated shape on the middle of the under side.

Phidippus multiformis.—This is a very common spider on plants throughout the summer. It matures in July, and the males and females are so little alike as to be taken for different species. The males [(fig. 134)] are black, with white and orange markings on the abdomen, while the females are brown mixed with black, white, and yellow scales and small white spots.

The usual length is about a third of an inch in both sexes. The cephalothorax is nearly as broad as long, and the abdomen of the female as wide as the thorax and a little longer.

The general color of the adult female is yellowish brown, with black and white markings [(fig. 133)]. Around the front of the abdomen is a white band, and on the back are two indistinct longitudinal black stripes in which are four pairs of white spots. The general brown color is produced by a mixture of scales and hairs of various colors. The females are most brightly colored just before reaching maturity, and then there is a large proportion of yellow and orange scales in their covering and the black stripes and white spots are more distinct. The hairs and scales are of various shapes, the most common being that of slightly flattened hairs. The yellow and orange scales are wider and less pointed, and the white spots have short and wide scales. Under the abdomen the color is light gray, with two parallel darker stripes. The legs are pale in the middle of the joints and dark toward the ends and covered with gray and black hairs. The palpi are light yellow.

In alcohol the orange color disappears almost entirely, the black and white markings become less distinct, and all the colors browner. The colors of the male [(fig. 134)] are entirely different. The cephalothorax and legs to the end of the tibia are black. The palpi are black, with a stripe of white scales on the upper side. Around the front end of the abdomen is a white stripe; the sides are bright orange red and the middle black. Between the orange and black are three pairs of white spots. They make a bag of white silk among leaves, in which in the early summer a male and female may sometimes be found together and in which the female later makes a cocoon of eggs. The young hatch soon and become half grown before winter.