134 MR. R. I. PococK ON THE SCORPIONS [Mar. IS, 



having the vesicle strongly infuscate and a very conspicuous V-shaped 

 testaceous mark on the tergites. By this last character also it may 

 be recognized from U.fallax (Koch) &nd U. striatus {Koch). From 

 U. triaiigulifer (Thorell) it may be at once separated by the absence 

 of the longitudinal bands on the upper surface of the abdomen ; 

 moreover, Dr. Thorell in his elaborate description makes no mention 

 of the enlargement of the basal pectinal tooth. 



Uroplectes formosus, sp. n. (Plate XIII. fig. 3.) 



Colour variegated black and orange-yellow, cephalothorax with 

 tubercle and ante-ocular area wholly black ; the lateral portions 

 marked with oblique testaceous bands aud the posterior half with 

 transverse testaceous bands ; the side margins black ; abdomen 

 above with black side margins ; marked throughout its extent 

 by two parallel wide black bands alternating with three (one 

 median) narrower yellow bands ; the black spot on each of the 

 tergites bears faint indications of the pale V-shaped mark, which 

 is so characteristic of the species of this group ; under surface of 

 trunk mostly pale, the posterior abdominal sternite only being deeply 

 infuscate at the sides, with a pale black-lined triangular area in the 

 middle behind ; tail with four first segments wholly pale above, 

 with a median thin black line aud black patches below ; fifth seg- 

 ment deeply infuscate below and above, but paler in the excavation 

 above ; vesicle deeply infuscate, but marked with paler bands ; aculeus 

 pale at the base, darker at the apex ; palpi with almost pale humerus 

 and brachmm, each of these segments being only marked above with 

 two irregularly shaped patches of colour ; the manus marked with 

 black lines, the spaces between these lines more or less infuscate ; 

 (lactyli wholly pale ; anterior surface of the legs strongly variegated 

 with black ; the maxillce of the first and second pairs infuscate. 



Cephalothorax with anterior margin nearly straight, the central 

 depression deep behind, shallow in front and over the ocular tubercle ; 

 the ocular tubercle with the area immediately at the sides and in 

 front of it wholly smooth, the posterior half weakly and somewhat 

 closely granular. 



Tergites. First six almost smooth, marked only with a few lateral 

 granules and a row of granules along the hinder margin ; the median 

 keel abbreviated in front and behind and smooth ; the seventh tergite 

 rougher than those that precede it ; very finely and closely granular 

 in the centre behind, more coarsely and sparsely granular at the 

 sides ; the lateral keels short, but coarsely granular, the median 

 elevation low and smooth. 



Sternites entirely smooth ; sparsely hirsute. 



Tail robust, widely and deeply excavated above and very feebly 

 granular ; fifth segment deeply de|)ressed above and behind; superior 

 keel well marked and granular on the first three segments, the terminal 

 grannie being large and tooth-like; superior keel wholly absent on 

 the fifth and represented on the fourth by large granules suliserially 

 arranged ; the superior lateral keel becomes progressively weaker 

 from bei'ore backwards, being scarcely visible on the fourth segment ; 



