844 ME. B. I. POCOCK ON SCOEPIOKS, PEDIPALPS, [NoV. 14, 



Genus Hystebocrates Simon. 



Htsteeoceaxes gigas Poc, 



Hysterocrates gigas Poc. loc. cit. p. 762. 



Loc. Cameroons {J. M. C. Johnston) ; Oil River (//. 11. Johnston), 



Hysteeoceates laticeps Poc. 



Hystet-ocrates laticeiis Poc. loc. cit. p. 7G5, pi. xli. figs. 4-4 i. 



Loc. Old Calabar {Miss Kingsley). 



Hysteeoceates ceassipes Poc. 



Hysterocrates crassijjes, Poc. loc. cit. p. 7G4, pi. xli. fig. 4 c. 



Loc. Caoieroons {B. U. Johnston). 



Hysteeoceates heecules, sp. u. 



5 . Colour. Integument black, covered with a thick coating of 

 dark olive-brown hairs, shining with greyish silky sheen under 

 reflected light. 



Carapace a little longer than patella and tibia of 1st and 

 of 4th leg, longer than tarsus and protarsus of 4th and than 

 patella, tibia, and tarsus of palp; its width equal to length 

 from tubercle to posterior emargination and to femur and patella 

 of 3rd leg, and to femur and one third of patella of 4th leg ; a 

 transverse depression in front of fovea, marking off a transversely 

 oval tubercle. 



Mandibles tubercular in front. 



Legs 4, 1, 2, 3; 4th exceeding 1st by nearly half its tarsus; 

 patella and tibia of 4th not longer than of 1st ; 4th leg not in 

 any sense thickened, femur more than three times as long as high 

 (25 : 7*8), thicker than patella, which is considerably thicker and 

 higher than tibia ; tibia slightly concave below and in the basal half 

 above, more than thi-ee times as long and wide as high (17*8 : 5"2) ; 

 length of upperside of patella more than twice its height or width. 



Measurements in millimetres. — Total length 74; length of carapace 

 34, width 30 ; length of palp 49, of 1st leg 81, 2nd leg 72, 3rd 

 leg 67, 4th leg 88; patella and tibia of 1st 33, of 4th 32 ; tarsus 

 and protarsus of 4th 31. 



Loc. Jebba, Upper Niger {Lieut. Aladie). 



Eecoguizable from the other known species of the genus by its 

 large size, darker colouring, and by having the 4th leg unmodified, 

 not thicker than the 1st, and only exceeding it in length by less 

 than half its tarsus. 



Hysieeoceates eobustus, sp. n. 



$ . Colour olive-greenish brown, with reflexions of greyish-white 

 pubescence. 



Carapace considerably longer than wide, the width equal to the 

 distance between the ocular tubercle and the median emargination ; 

 the length equal to that of patella and tibia of 4th leg, greater than 

 those of 1st and greater than tibia and protarsus of 1st ; the width 



