The 0.2 cm black spider is a big-bellied spider. The female spider in Daduyuan is 12-22 mm long, with various body colors and markings, black or dark brown. The dorsal nail is flat, the front end is wide, the middle fossa is horizontal, and the neck groove is obvious. There is a T-shaped macula in the center of the chest plate with a dark brown periphery. There is a shoulder process at the front end of the abdominal back, and the heart is yellowish brown. There are two black tendons on each side, which are arranged in a trapezoidal shape. There are brown-black leaf spots from the ventral back to the tail of the body, with black ripples on the edge, and the two sides of the leaf spots are yellow-brown. The center of the abdomen is brown with a black stripe on each side. The rotator is dark brown. The pituitary gland of the external reproductive organs is black, partly soft and curved, yellow and white, annular, with brown and hard ends and rolled edges. The length of male spider is 12- 17mm. The middle fossa is pit-shaped. The gait is longer than that of the female spider. 1 The tibiofibular joint ends of both feet are thick, with thick spines in the lower medial corner, and the base half of the posterior tarsal joint is curved.