HANSEN AND SÖRENSEN, THE TARTARTDES. 53 



§. Setse on the upper surface of the body and along 

 the upper margin of the three posterior pairs of 

 walking legs simple, thin, acute. 



7. T. Grassii Thor. 



§§. Setae on the upper surface of the body and along 



the upper margin of the three posterior pairs of 



walking legs subclavate. . 8. T. daviger n. sp. 



b. Head on each side with a real eye, possessing a convex 



vitreous cornea 9. T. Camhridgei Thor. 



a. Bye-spots, if present, without real cornea. 



a. Patella of the palps with setse along the lower mar- 

 gin; claw of the palps conspicuously less than ^/s 

 as long as upper margin of tarsus. 



1. Trithyreus africanus n. sp. 

 Probably immature Female. 



Pl. 4., figs. 2 a— 2 d. 



Ceplialothorax. — Head without distinct eye-spots. Ce- 

 phalic sternum much longer than broad. Second thoracic 

 tergite with a sharp longitudinal suture, but without membra- 

 nous strip. 



Palps. — Moderately slender (fig. 2 a), nearly half as 

 long as the body. Trochanter (fig. 2 b) with the lower front 

 angle very obtuse, measuring 130°, rounded. Femur (fig. 2 b) 

 with its lower margin somewhat convex, its angle is scar- 

 cely developed, adorned with the most proximal one of the 

 lower setse, and it is slightly longer from the distal than from 

 the proximal end of the upper margin of the joint. Patella 

 a little more than two and a half times longer than deep. 

 Claw short, a little more than one third as long as the upper 

 margin of tarsus. 



First Le^s. — Robust (fig. 2 a), only as long as the body. 

 Coxa terminatés somewhat behind the outer angle of the man- 

 dible. Femur about ^/4 as long as tibia. Foot as long as 

 tibia, nine times longer than deep (fig. 2 c); second metatarsal 

 joint nearly longer than the sum of the five proximal tarsal 

 joints; terminal joint almost as long as the sum of the four 

 proximal tarsal joints, and a little less than two thirds as long 

 as the whole me tatarsus. 



