1890.] OF THE FAMILY BUTHID^. . 141 



Legs with anterior surface oi femur and patella somewhat coarsely 

 granular, but uot markedly carinate, the granules being only sub- 

 seriall}- arranged ; tibice of the two posterior pairs armed distally 

 beneath with a spur ; coxce of legs smooth. 



Pectines with 20 or 21 teeth ; all the teeth alike ; in the male the 

 teeth are larger and the pectiues longer, extending in fact consider- 

 ably beyond the extremity of the coxse of the fourth pair of legs ; 

 in the female they fall short of this point. 



Stigmata slit-like. 



Measurements in millimetres. — Total length 27 ; cephalothorax, 

 length .■>, width 3'5 : length of tail 17'5; of 1st segment 2; of 

 2nd 2'3 ; 3rd 2-5 ; 4th 3 ; 5th 4 ; vesicle 2 ; width of 1st segment 2, 

 of 5th rz. Palpi — humerus, length 3 ; brachium, length 35, width 

 1*3; manus, width 1*3; length of "hand-back "' 2; length of 

 movable dactylus 3-5. 



Three specimens, c? and $ , from Madagascar, collected by the 

 Rev. R. Baron. 



This species differs markedly from those here described in its 

 variegated colouring. In this respect it somewhat resembles 

 apparently R. centrurimorphiis, which is also a Madagascar species ; 

 but according to Dr. Karsch this last species differs from R. hilttneri 

 only in colour. I conclude, therefore, that it is furnished with 

 keels on the hand and with only eight keels on the second caudal 

 segment ; if so, R. baroni differs from it in having a smooth hand 

 and ten keels ou the second caudal segment. 



EXPLANATION OF THE PLATES. 

 Plate XIII. 



Fig. 1. Rhoptrums jacksoiii, s'p. w. Nat. size. $,p. 138. 



la. . Extremity of dactylus. 



'1. baroni, sp. n. Nat. size, p. ] 40. 



3. Uroplectcs formosus, sp. u. Nat. size, p. 134. 

 3 a. — . Extremity of dactylus. 



4. hmgnis, sp. u. Nat. size, p. 13-. 



5. triangulijcr (Thor.). Nat. size. S • P- 137. 



5 a. . Extremity of dactylus. 



5 b. . Vesicle. 



Plate XIV. 



Fig. 1. Rlioptrurus kirJci, sp. n. Nat. size. S , p. 137. 



2. Lepreiis fischcri, Karsch, var. nigrimanus. Nat. size, p. 130. 



2 a. , . Extremity of dactylus. 



3. carinatus, sp. n. Nat. size, p. 129. 



3 a. . Extremity of dactylus. 



4. occidentalis (Simon). Nat. size, p. 132. 



4 a. . Extremity of dactylus. 



5. Uroplcoies Jiavo'uirulLs, Tetevs. Nat. size. 5>P'^37. 



5 a. . Extremity of dactylus. 



PROC. ZooL. Soc— 1890, No. XI. 1 1 



