Pedipalpi, Ricinulei, ami Opiliones. I7 



Trithyreus brevicauda n. sp. 



PI. I. figs. 4 a — 4fl; PI. TI, fig.s. I a — I g. 



Male. 



Head without any distinct eye-spot on the sides. Cephahc 

 sternum much longer than broad. Second thoracic tergite with 

 a sharp median suture. 



Palps (figs. I a and i b) moderately robust, somewhat less 

 than half as long as the body. Trochanter with the lower 

 distal part sUghtly produced, the comer acute but the angle 

 measuring about iio°. Fennir a little less than twice as long 

 as deep, subtriangular, but the median part of the lower margin 

 convex without any angle, and its deepest point a little longer 

 from the proximal than from the distal end of the upper margin. 

 Patella a Httle less than two and a half times as long as deep ; 

 tibia slighth^ more than three times as long as deep. Tarsus 

 not elongate; its upper margin a little more than half as long 

 as that of the tibia. Claw distinctly less than half as long as 

 the upper margin of the tarsus. 



First pair of legs (fig. i a) moderately robust, somewhat 

 longer than the body. Coxae terminate somewhat before the 

 outer angle of the mandibles. Femur somewhat longer than 

 the tibia. Foot as long as the tibia, between eight and a half 

 times and nine times as long as deep (fig. 1 e), deepest towards 

 the end of the metatarsus ; second joint of metatarsus nearly as 

 long as the sum of the four proximal joints and half of the 

 fifth joint of the tarsus; terminal joint slightly longer than 

 fourth and fifth tarsal joints combined, and distinctly more 

 than half as long as the whole metatarsus. 



Fourth legs a little shorter than the body. Fenmr two and 

 one-third times as long as deep (fig. 4 b). 



Three posterior abdominal segments telescoped (fig. 1 g) 

 and somewhat thicker than in the female; last segment without 

 any protruding part above the insertion of the flagellum. 



