Mr. R. I. Pocock on South- African Scorpions. 383 



divided by a fine yellow line. The only other distinctive 

 feature that I notice in this form is the smaller size of the 

 tubercle beneath the aculeus. 



From the constancy of these characters it seems to me that 

 U. lineatus must at all events be looked upon as a distinct 

 subspecies, a melanistic mountain form, of U. lineatus. It is 

 a significant and interesting fact that Mr. H. A. Spencer, 

 who, while acting as medical officer on board the U.S.S. ' Mexi- 

 can,' was collecting on and off for some years in S. Africa, 

 never took the typical U. lineatus upon Table Mountain nor 

 U. insignis on the lower ground in the neighbourhood of 

 Cape Town, and he himself was struck by the darker tint of 

 the mountain form. 



Uroplectes formosus, Pocock. 



Uroplectesformosus, Pocock, Proc. Zool. Soc. 1890, p. 134, pi. xiii, 

 fig. 3. 



Principal form. — With a single small fuscous spot upon the 

 upper surface of the trochanter of the palp ; two spots upon 

 the femur, one at its distal and the other at its proximal end ; 

 two spots upon the tibia, one small, distal, the other larger 

 but irregularly defined and median ; the hand blacker ; a 

 fuscous spot upon the maxillary lobes of the first and second 

 pairs of legs. The > -shaped spot very indistinctly defined ; 

 the last tergite almost entirely black at the sides, with only a 

 very narrow yellow stripe just above the black margin ; the 

 lower surface of this last segment also almost entirely fuscous, 

 with a posterior median triangular yellow spot. The upper 

 surface of the first four tail-segments entirely orange-red, not 

 black ; the lower surface of these segments with a thin inferior 

 median black band and adorned with irregular black patches 

 at the side. The vesicle of the tail with scarcely a trace of 

 yellow lines. 



Loc. Port Natal (E. Howlett). 



Uroplectes formosus, Poc, subsp. Spenceri, nov. 



Coxae and maxillary lobes of the anterior appendages 

 without fuscous spots ; a single large fuscous patch covering 

 the proximal end of the humerus above ; the proximal patch 

 upon the brachium larger and better defined ; the hand paler 

 and distinctly black-lined. The flavous > -shaped mark on 

 the tergites well defined, the seventh tergite largely flavous at 

 the sides ; the sternite flavous, with three black bands, one 

 slender median and one on each side wider and less well 

 defined. The anterior four segments furnished with seven 



