HANSEN AND SÖRENSEN, THE TARTARIDES. 65 



Remarks. — This species is more closely allied to T. sia- 

 'tnensis than to any other of the forms known, but the adult 

 females of these two species are easily distinguished from each 

 other by the foot of first legs; in T. modestus the foot is 

 deeper, metatarsus sh orter and the terminal joint longer than 

 in the other species; furthermore the femur of fourth legs is 

 shorter and deeper in T. modestus. *■ 



a. p. Patella of the palps with a row of spines along 

 the lower margin; claw of the palps conspicuously more 

 than 2/3 as long as upper margin of tarsus. 



7. Trithyreus Grassii Thor. 

 Adult Female. 



Pl. 6., fig. 4a; Pl. 7., figs. 1 a— 1 d. 



1889. Tripeltis Grassii Thorell, Ann. Mus. Civ. Genova, Ser. 

 2., Vol. VII, p. 554. 



Cephalotliorax. — Lateral eye-spots wanting. Cephalic 

 sternum considerably longer than broad. Second thoracic ter- 

 gite with a longitudinal membranous strip which is oblong 

 triangulär, narrow anteriorly and widening considerably back- 

 wards. 



Palps. — Moderately slender (fig. 1 a), slightly more than 

 two thirds as ]ong as the body. Trochanter has its lower 

 anterior part strongly produced into a large triangulär plate, 

 its angle measures about 60°, the end itself is acute but not 

 produced into a process. Femur is oblong, not fully twice as 

 long as deep; its lower angle is feebly protruding, not roun- 

 ded, armed with a slender spine, its tip is somewhat longer 

 from the distal than from the proximal end of the upper 

 margin of the joint. Patella is slightly moie than two and a 

 half times longer than deep; its lower margin bears a row of 

 five rather strong spines. Claw verv long, only slightly shorter 

 than the upper margin of tarsus (fig. 4 a). 



First Legs. — Very slender and very long (fig. la), ''i 

 times as long as the body. Coxa terminates just at the outer 

 angle of the mandibles. Femur even a little shorter than tibia 

 which is very long. Foot slightly more than half as long as 



Arkiv för Zoolog i. Bd 2. N:o S. 5 



