196 JOURNAL, OF ENTOMOLOGY AND ZOOLOGY 



Ideobisiiim threveneti Simon 



Description: Length of animal, including mandibles, 4 mm. ; 

 length of palps, 3.5 mm.; length of abdomen, 3 mm.; length of 

 claw, 1.5 mm. Color — Cephalothorax and palps, dark reddish 

 brown; abdomen, lighter than cephalothorax; legs, pale yellow. 



Cephalothorax: As long as it is broad, upper margin truncate, 

 sides nearly straight, lower margin straight; no suture; four distinct 

 eye spots; eyes on each side almost touch each other. . 



Abdomen: Elongate, three times as long as it is broad; scuta 

 entire. 



Palps: Coxa smooth; trochanter small; femur long, outer edge 

 almost straight, inner edge slightly convex; tibia short and stout, 

 pedicellate, convex on inner and outer surface. 



Claw: Not large; finger as long as hand and not curved very 

 much; hand, broad, evenly convex on inner and outer edges. 



Legs: Lack trochantins. III and IV stouter than I and II; man- 

 dibles large; serrula not attached throughout length of moveable 

 finger; spinnerets long and transparent. 



Habitat: Claremont, Ice House Canyon, under leaves. 



Ideoroncus obscurus Banks 



Description: Length of animal, including mandibles, 3 mm.; 

 length of pedipalps, 3 mm. Color — Cephalothorax and pedipalps 

 dark yellow brown; abdomen and legs very light yellow. 



Cephalothorax: A little longer than broad; front margin slightly 

 truncate, rounded; sides so slightly convex as to be almost straight; 

 lower margin slightly recurved; no transverse sutures; one pair of 

 eyes. 



Abdomen: Elongate and slender; scuta entire; both abdomen 

 and cephalothorax with a few simple scattered hairs. 



Palps: Long and slender; coxa smooth; trochanter lacks large 

 protuberance of many of the Cheliferidae; femur hardly as long as 

 cephalothorax, very slender and not pedicellate; tibia shorter and 

 broader than femur, pedicellate, convex on inner edge, only slightly 

 so on outer edge; trochanter, femur, and tibia covered with short, 

 stout simple hairs; claw long and slender; finger little longer than 

 hand, and only slightly curved; hand twice as long as broad; hand 



