Mr. R. I. Pocock on South-African Scorpions. 391 



patches ; without fuscous tips to the max- 

 illary lobes of the first and secoud pairs of 

 legs and scarcely a trace of a black patch on 

 the maxillary (basal) segment of the. chela ; 

 last abdominal sternite flavous, with a black 

 patch on each side of it ; terga more dis- 

 tinctly granular. (Subspecitic form from 

 East London.) Spenceri, nov. 



The sections indicated in this table by the numbers I, 2, 3, 4 

 represent, I believe, the natural groups into which the species 

 fall ; but at present, for reasons stated above, I do not con- 

 sider it advisable to adopt generic titles for these sections. 

 Probably, however, the name Lepreus applies to no. 1 and 

 Tityolepreus to no. 2 ; but it appears to me by no means 

 certain whether Uroplectes, the oldest name for the group, is 

 applicable to 2, 3, or 4. 



The following species, unknown to me in nature, also fall 

 into this genus : — 



1. Scorpio (Atreus) spinicaudus, Gervais (Arch. j\tus. iv. 

 p. 222, pi. xi. figs. 22-25, 1841), from Caffraria, will probably 

 be found to belong to no. 4, and will perhaps prove identical 

 with U. formosus Spenceri. 



2. Tityus fallax, C. Koch (' Die Arachniden,' xi. p. 1, 

 fig. 850), from Africa, also apparently falls under no. 4. If 

 adult, the type probably represents a species distinct from 

 those enumerated, but if immature may prove to be the 

 young of U. insignis. 



3. Tityus striatus, C. Koch (t. c. p. 6, fig. 853), from 

 Africa. — The same remarks apply to this form as to T.fallax. 

 On the strength of the figures of these species it is impossible 

 to say for certain that they are synonymous with any of those 

 recognized in the above table ; for it is unjustifiable to ascribe 

 inaccuracy to these figures, seeing how accurate on the whole 

 are those of U. lineatus and U. variegatus. 



4. Uroplectes ornatus, Peters (Mon. Ak. Wiss. Berlin, 

 1862, p. 516), from Tette, was said by Karsch to fall into 

 "I'ityus" of C. Koch, a statement which means presumably 

 that it belongs to the same category of species as U. triangu- 

 lifer, Thor. It is a pity that we cannot locate this species 

 more satisfactorily, for since it is the type of the genus Uro- 

 plectes, its exact systematic position is of the greatest import- 

 ance to those who would more finely divide the genus. 



