Superfamily Argiopoidea 



distinct, more distinct in immature individuals than in adults. 

 There is a light coloured seam on the lateral margin of the cephalo- 

 thorax; that part of the thorax that is overlapped by the abdomen 

 is white; and on each side of this white area there is a small 

 white spot on a black patch. On each side of the guide of the 

 epigynum, there is a prominent, dark-coloured, pear-shaped body 



(Fig- 597)- 



The male measures one fifth inch in length and is more 

 distinctly marked than the adult female. The two apophyses 

 of the genital bulb are hook-like, with the tips curved toward 

 each other (Fig. 598). 



This species is very widely distributed and common in many 

 places; it is usually found under bark or stones. 



Xysticus limbatus (X. lim-ba'tus).— - The female (Fig. 599) 

 measures about two fifths inch in length. The cephalothorax 

 is reddish brown streaked and marbled with a lighter colour; on 

 the lateral margin there is a white seam; and in the middle a 

 broad longitudinal band, which is bordered with a yellow line 

 and marked with many irregular lines of this colour; the eye 

 space is reddish yellow. The sides of the abdomen are yellowish 

 white, with rows of brown points in oblique wrinkles; the dorsal 

 area is brown marked by transverse lines of a lighter colour. The 

 cavity of the epigynum (Fig. 600) is large and deep; the guide 

 is but slightly raised, and consists of a median, longitudinal 

 partition, from the hind end of which an arm extends forward 

 and outward on each side. 



The male is one third inch in length, and resembles the female 

 in markings; but it is a little darker. The apophysis on the 

 upper and outer face of the tibia of the palpus is very long and 

 slender (Fig. 601). 



This species was described from Colorado and Texas; but 

 it is widely distributed in the East. 



Xysticus luctans (X. luc'tans).— - The full-grown spider meas- 

 ures from one fourth to one third inch in length. The two sexes are 

 quite similar in colour and markings. The cephalothorax is light 

 reddish yellow, with four very distinct, brown, longitudinal 

 stripes, two on each side, one marginal, and one extending back 

 from the posterior lateral eye; there is a small brown spot near 

 the hind end of the cephalothorax, and a pair of similar spots 

 halfway between this and the eyes; the cephalothorax is unusu- 



536 



