THE THOMISID/E 



33 



Xysticus triguttatus. — This is a small and very common 



spider living on grass and low bushes. The female is about a 



fifth of an inch long and the male as large but with a smaller 

 abdomen. The difference in the color of the sexes 

 is so great that they may easily be 

 mistaken for different species. The 

 females (fig. 95) are straw-colored, 

 the abdomen almost white, and the 

 thorax and legs brownish yellow. 

 There are three black spots at the 

 back of the thorax and indistinct 

 darker bands at the sides. On the 

 abdomen are two black spots near 

 the front end and three pairs of 

 broken transverse stripes behind. 

 The male 

 {fig. 96) has 

 the femora of 

 the two front 

 legs dark 

 brown, the 

 rest like the 



female or a little darker. The thorax is 



dark brown, except in the middle, where 



it is a little lighter, as in the female. The 



abdomen of the male is strongly marked 



with transverse black and white stripes, 



irregular toward the front end. 



Xysticus quadrilineatus. — Quarter of an F1G.9S. Xysticus quadriiine- 



inch long, with the thorax a tenth of an atus, enlarged four times. 



inch wide and the head unusually wide in front. The color is 

 light yellow, with light brown markings and black spots. The 

 cephalothorax has four narrow brown stripes, one on each side 



Fk;s. 95, 96, 97. Xysticus triguttatus. 

 — 95, female. 96, male. Both en- 

 larged four times. 97, front of head 

 much enlarged to show eyes and 

 mandibles. 



