Superfamily Argiopoidea 



in different individuals, and are sometimes so large, especially 

 in males, that the spider is nearly black. This spider closely 

 resembles in appearance a Xysticus; but the body is more flattened 

 than in that genus, and the genital bulb of the male is quite 

 diffeient. The female can be most easily recognized by the form 

 of the epigynum (Fig. 587); and the male, by the form of the 

 genital bulb (Fig. 588). The embolus is long and curved. In 



«te»M Imp* 



Fig. 587. 



EPIGYNUM OF CORIARACHNE 



VERSICOLOR 



Fig. 588. 



PALPUS OF MALE 



OF CORIARACHNE 



VERSICOLOR 



the unexpanded bulb, the terminal part of it is protected by the 

 lower edge of the cymbium, bordering the alveolus, but a well- 

 developed tutaculum, such as is seen in Xysticus, is lacking; 

 so also are lacking the prominent apophysis of the bulb char- 

 acteristic of Xysticus. 



This is a common species, which is found on fences and under 

 stones; its colours frequently so closely resemble those of the ob- 

 jects upon which it is found that it is seen with difficulty. 



Genus XYSTICUS (Xys'ti-cus) 



In the genus Xysticus the posterior eyes are nearly equi- 

 distant, with the median a little smaller than the lateral; the 

 anterior median eyes are usually a little farther from each other 

 than from the anterior lateral eyes and much smaller than 

 the anterior lateral eyes. The median ocular area is as wide 

 as or wider than long, and is as wide as or a little wider in 

 front than behind. The lateral eyes of each side are situated 



532 



