HANSEN AND SÖRENSEN, THE TARTARIDES. 57 



legs ^/ä as long as deep. Flagellum broken off; in an other 

 juvenile specimen, wbich is slightly larger, flagellum is scar- 

 cety four and a lialf times longer than deep, and the two 

 articulations could not be discerned with certainty. Colonr 

 more greenisb and a good deal lighter than in the adults. 



Locality. — Ceylon: one adult male, tAvo adult females 

 and some immature specimens from »Maturata. Galles» (E. 

 Simon' s collection); the specimen described by Pocock was 

 secured at Punduloya. 



Remarks. — This species is large; the male has the legs 

 longer and more slender than in any other form hitherto 

 known; the adult female is easily distinguished by its slender 

 legs, the relative dimensions of the joints in the foot of first 

 legs, etc. — It is impossible to recognize the species with 

 certainty from Mr. Pocock's description and drawings, but 

 during a stay in London my friend Mr. C. J. With has exa- 

 mined the type specimen and furnished me with a set of sketches 

 and measurements ; from these I see that the type is an imma- 

 ture specimen of this species. 



3. Trithyreus siamensis n. sp. 

 Male (mutilated) and Female. 



Pi. 5., figs. 2 a— 2 h. 



Cephalothorax. — No eye-spots could be perceived. Ce- 

 phalic sternum much longer than broad. Second thoracic 

 tergite with a sharp suture conspicuously allowing flexion. 



Palps. — Male (fig. 2 a): Rather slender. Trochanter has 

 the lower front part strongly produced, its anterior margin is 

 concave, the angle measures about 50°, but its tip is obtuse. 

 Femur has its lower part moderately protruding; the angle 

 itself is sharp, adorned with a spine, and scarcely longer from 

 the distal than from the proximal end of the upper margin 

 of the joint. Patella nearly three times longer than deep. 

 Claw about -k as long as the upper margin of tarsus. — 

 Female (fig. 2 b): A little less slender than in the other sex, 

 slightly more than ^jb as long as the body. Trochanter (fig. 2 c) 

 less produced than in the male, Avith the anterior margin 

 straight and the lower front angle 75°. Patella two and half 

 times longer than deep. 



