Spiders and Their Near Relatives 



Genus SITALCES (Si-tal'ces) 



The eye-tubercle arises from the anterior margin of the 

 carapace. The pedipalps are shorter than the body. The tarsus 

 of the fourth legs bears two simple claws. 



Sttalces calif ornicus (S. cal-i-for'ni-cus). — The colour of the 

 body is yellow, venter paler, legs whitish toward the tips. Body 

 oval, truncate in front, rounded behind. Eye-tubercle large, 

 arising from the anterior margin of the carapace, and about one 

 half as long as the cephalothorax, much roughened and finely 

 granulated; eyes near the base of the tubercle. Legs short. 

 Length of body one twelfth inch. Occurs in southern California. 



Genus PHALANGODES, (Phal-an-go'des) 



The eye-tubercle arises some distance back from the anterior 

 margin of the carapace, but it bears no eyes. The pedipalps 

 are longer than the body. The tarsus of the second pair of legs 

 is about twice as long as the body, and the tarsus of the fourth 

 pair of legs bears two simple claws. 



Phalangodes armata (P. ar-ma'ta). — This, our only species 

 of the genus, is found in the Mammoth Cave and in other caves. 



The body is from one eighth to one sixth 

 inch in length. All of the legs are re- 

 markably long and slender. The colour 

 of the adult is whitish straw-yellow, of 

 the young, white. 



Suborder PLAGIOSTETHI 

 (Pla-gi-os-te'thi) 



In the members of this suborder the 

 sternum of the first abdominal segment 

 extends much in front of the hind coxae 

 (Fig. 55). A result of this forward thrust 

 of this sternite is that the sternum of the 

 cephalothorax is short and transverse; this 

 suggested the name Plagiostethi, which is from the Greek words 

 plagios, transverse, and stcthos, breast. The tarsi of the legs 

 are furnished each with but one simple claw; the tibia and tarsus 

 of the pedipalps are cylindrical; and the second legs are the 



64 



Fig. 55. VENTRAL ASPECT 

 OF LEIOBUNUM VENT- 

 RICOSUM 



