ARACIINOMOItPHJE. 



207 



'. Posterior spinners present, not shorter than 



anterior. 

 a 6 . 1st leg enormously thick, with tarsus pedun- 

 culate and almost clawless Palpimanidce. 



¥. 1st leg typically subsimilar to the rest (larger 

 in most Attidae) ; its tarsus normal and 

 clawed. 

 a 1 . Posterior spinners enormously long and 



apically slender Hersiliidae 



b~. Posterior spinners shorter and thick. 

 « 8 . Anal papilla very large, fringed with 

 long hairs; posterior spinners much 



larger than anterior Urocteidae. 



b 8 . Anal papilla small, not fringed; pos- 

 terior spinners generally subequal to 

 the anterior. 

 « 9 . Claws 3 ; no ungual tufts. 



a 10 . Tarsus of 4th leg with comb of 



spines below Theridiidae. 



b 10 . Tarsus of 4th leg without comb of 

 spines. 

 a 11 . Maxilla} inclined on labium; 

 mandibles scarcely toothed ; legs 



very long and slender . . Pholcidae. 



ft 11 . Maxillse not inclined on la- 

 bium ; mandibles toothed ; legs 

 shorter and thicker. 

 « 12 . Tarsi armed apically with 

 curved serrate spines. Seden- 



tiiiy web-weavers Argyopidae. 



/>'"'. Tarsi without serrate spines 

 at apex. Hunting Spiders. 

 a 13 . Mandibles powerful, 

 toothed; labium and max- 

 illa? short Lycosidae. 



6". Mandibles weak, weakly 

 toothed; labium and max- 

 illa? long Oxyopidae. 



6 n . Claws 2 ; ungual tufts present. 

 a u . Anterior spinners wide apart at 



base Gnaphosidce. 



6". Anterior spinners close together 

 at base. 

 a 15 . Anterior median eyes enor- 

 mously large ; eyes of posterior 

 line forming a square on sides 



of head Attida. 



b is . Eyes more normal in size and 



position. 



a 10 . Mandibles prominent, strongly 



toothed; 3rd and 4th lega 



not much shorter than 1st 



mid 2nd Clubionidae. 



A 1 '. Mandibles weak, weakly 

 toothed ; 3rd and 4th legs 

 much shorter than 1st and 

 2nd Thomisidte. 



