Superfamily Argiopoidea 



Nearly thirty species have been found in the United States; of 

 these the following are the more common. 



Bathyphantes concolor (B. con'co-Iour). — The length of the 

 body is about one twelfth inch in both sexes. The cephalothorax 

 is yellowish brown; the legs, yellow. The abdomen is gray with- 

 out any markings. The ovipositor (Fig. 389) is long and slender; 

 it reaches nearly or quite to the middle of the abdomen. The 

 ovipositor consists of two pieces; the second piece, the parmula, 

 is much shorter than the first, the scape, and is concealed by it 

 except when viewed in pro- 

 file. The cymbium of the 

 male palpus is long and 

 tapering. 



This is a common 

 species throughout the 

 North. We have taken 

 adults of both sexes in 

 September; they pass the 

 winter under leaves. 



Bathyphantes nigrinus 

 (B. ni-gri'nus). — This is a 

 little larger than the pre- 

 ceding species, measuring 

 one tenth inch in length. 

 The cephalothorax and 

 legs are light yellowish 

 brown; and the abdomen is 

 dark gray or black with 

 five or six transverse light 



bands. The ovipositor is long and slender, and differs from 

 that of the preceding species in that the second piece extends as 

 far back as the first (Fig. 387). The cymbium of the male palpus 

 is short and truncated, and the embolus is twisted in a circle on 

 the end of the bulb. 



Fig. 389. 



EPIGYNUM OF BATHYPHANTES CONCOLOR 



a, lateral view b, ventral view 



Genus LEPHTHYPHANTES (Leph-thy-phan'tes) 



This genus differs from Bathyphantes in having the spines 

 of the legs longer and more numerous; the metatarsi, however, 

 usually bear only one spine, the femora of the fore legs one or two, 



379 



