HANSEN AND SÖRENSEN, THE TARTARIDES. 61 



the side the upper margin of flagellum is sinuate, while the 

 proximal half of the lower margin is strongly convex, and the 

 distal part rather ascending. Even the longest setse are shghtly 

 more than one third as long as flagellum. — Feinale: Flagellum 

 (fig. 1 b) is only a little more than half as long as in the 

 male, a little less than five times longer than deep, three- 

 jointed; the terminal joint is ^/ö of the wliole length. 



3Ieasuremeiits. — Body cT 3.6, 9 3.: mm.; palps ef I.7, 

 9 2.0 mm.; first legs o^ 6.8, 9 5.2 mm.; fourth legs ef 4.6, 

 9 4.2 mm. 



Colour. — Walking legs and upper surface of abdomen 

 and of the posterior part of cephalothorax olive green, front 

 part of the head, antennas and palps reddish with olive green 

 tint; lower surface of the body lighter, yellowish. 



Locality. — Singapore; the two specimens described (E. 

 Simon's collection). 



Remarks. — This slender species is rather small, but as 

 to the structure of both sexes it is nearly intermediate between 

 T. suhoculaius and T. siamensis, both much larger. The male 

 is easily distinguished by the shape of the terminal abdominal 

 segment and the flagellum; the female can be separated by 

 the foot of first legs, the shape of trochanter of the palps, etc. 



5. Trithyreus luzonicus n. sp. 

 Male and Female. 



Pl. 6., figs. 2 a— 2 m. 



Cephalothorax. — Head with an oblong, badly defined, 

 påle spöt on each side. Cephalic sternmn considerably longer 

 than broad. Second thoracic tergite with a well -defined lon- 

 gitudinal narroAv strip of membranous skin. 



Palps. — Slender (figs. 2 b, 2 e and 2f), half as long as 

 the body. Trochanter in the male has its lower front part 

 considerably produced, with the anterior margin nearly straight 

 and the angle measuring about 70° (fig. 2 c); in the female 

 this angle is about 90° (fig. 2 f ) . Fem ur has its lower part 

 triangulär, with the angle moderately protruding; the tip of 

 this angle is a little longer from the proximal than from the 

 distal end of the upper margin of the joint. Patella about 

 ^/s times as long as deep ; tibia slightly more than three times 



