THE CANADIAN ENTOMOLOGIST. 95 



( A transverse furrow on venter, lower spinnerets widely separated 



^. . Hahnincp. 



I No ventral furrow, spinnerets as usual A^alenmcp. 



The latter may be divided into two tribes. 



J Upper spinnerets long, two-jointed Agalenl 



{ All spinnerets short Cybaeni 



Family 14, Enyoidce. 



The lower spinnerets here are long and two-jointed. Otherwise much 

 like the preceding family. We have one genus, Habronestes, in the 

 Southern States. 



Family 15, Palpi)nanidce. 



Peculiar in having but one pair of spinnerets. One genus, Lutica 

 from Utah. 



Family 16, DictyiiidcE. 



This family is much like Agalenidcp., but have the accessory spinning 

 organs. They are usually smaller. They spin small irregular webs, 

 hanging from the under side. 



Section IV. — This includes a large number of common spiders. They 

 spin webs to catch prey. Most of the forms are very much alike in 

 appearance. The abdomen short and rounded, the cephalothorax short 

 with well developed pars cephalica, and the legs somewhat long, always 

 with three claws. The spinnerets are short, the male and female organs 

 well developed. 



Family 17, Theridiidce. 



This is the largest family of spiders, and many of its members are very 

 small. They spin irregular webs, and hang inverted from the under side. 

 The males frequently possess peculiar sexual modifications of the head. 

 They can be arranged in three sub-families whose limits are not distinct. 

 Their general characters are as follows : — 



Theridince. 



The abdomen is large and roundish, the cephalothorax short, the legs 

 long and quite slender ; mandibles thinner than femur I.; male palpal 

 organ without tarsal hook. 



