THE CINIFLONID^, OR CRIBELLATA 



215 



Amaurobius ferox. — This lives in houses and is probably an 

 imported species, as it is more common in Europe. It grows 



a little larger than sylvcstris (fig. 489), and 

 the head is a little more narrowed in front 

 of the legs. The colors and markings are 

 much as in sylvestris, but the abdomen is 

 often darker, and the middle light stripe on 

 the front more distinct. The epigynum 

 has a larger middle lobe, and the lateral 

 lobes are straighter and do not meet in the 

 middle. The males are colored like the 

 females and have the thorax wider and 

 the legs longer. The palpi of the male 

 have the tarsus short and round. The tibia 

 (fig. 492) has only a small short hook on the 

 inner side, and a large blunt process on the 

 fig. 493. Amaurobius outer side. The male palpi and the epigynum 



amencana, enlarged distinguish these easily from the last species. 



four times. ° J 



Amaurobius (Titanceca) americana. — Quarter 

 of an inch long and deep black, except the cephalo- 

 thorax, which is dull orange color, but covered, like 

 the rest of the body, with long black hairs 

 (fig. 493). Some individuals have a 

 few light gray spots in pairs on the 

 abdomen. The shape 

 of the cephalothorax 

 and abdomen are like 

 Amaurobius sylves- 

 tris, and the legs are 

 of the same propor- fig. 494 

 tional length and 

 stouter. The palpi 

 of the female have the tibia and tarsus a little thickened. The 



Female Uloborus plumipes, enlarged eight times, 

 showing the tuft of hairs on the front legs and the cala- 

 mistrum on the fourth legs. 



