AJrican 8;pecimens of the Oenus Scorpio. 251 



Length. Width. Height. 



Total 125 



Cephalothorax 17 18 



Tail 66i 



First caudal segment . . . . 8| 7 5 



Fifth „ „ .... 15 5 5 



Vesicle 9 7^ 7 



Aculeus 5| 



Humerus 11^ 



Brachium 13| 



Hand 17| 16 7^ 



Back of hand lO^ 



Movable finger \7\ 



Immovable ,, 12^ 



A single specimen (dried), from Slioa in Abyssinia. 



Owing to the unfortunate destruction of the pectines I 

 am unable to describe the characters presented by these 

 organs, and in addition cannot tell the sex of the specirneii. 

 It, however, is a very distinct form, differing from all other 

 individuals of the genus known to me in the remarkable size 

 of the poison-vesicle. It is mainly, though by no means 

 entirely, on the strength of this characteristic that I have 

 ventured to give a new name to it. 



Scorpio maurus^ Linnreus. 



Scorpio maurus, Linn. Syst. Nat. p. 1037. 



Heterometrus palmatus., Ehrenb. Symb. Phys. (Scorpiones, pi. i. 

 fig. 4.) 



Although possessing a number of specimens of this species 

 from Arabia and Syria, the British Museum has only three 

 from Africa. These are from Tunis. 



Scorpio dictator y sp. n. 

 Syn. ? Scorpio africanus, Linn. Mus. Adolphi Friderici, p. 84, 



Cephalothorax, — Anterior margin semicircularly excised 

 in the middle line ; marked throughout its length by a 

 median longitudinal sulcus, which deepens and terminates 

 near the diind margin ; on each side this deeper portion is 

 bounded by a rounded prominence ; cephalothorax everywhere 

 beset with coarse granules. Central eyes equally distant 

 from the posterior margin of the cephalothorax and from the 

 apex of the anterior excision. Central eye of lateral series 

 slightly nearer to the anterior than to the posterior eye 

 of the same series. 



Anterior half of each tergite smooth, posterior half coarsely 

 granular ; each furnished in the middle with two sliort sulci 



17* 



