African Specimens of the Genus Scorpio. 255 



b^. Humerus less rounded off in front ; its an- 

 terior surface separated by a conspicuous 

 ridge from the upper and under surfaces. 

 a^. Central eye of the lateral series nearer 

 to the posterior than to the anterior 

 eye of the same series; tergites very 



finely granular; pectinal teeth 16-18. . inijieratoi' (C. Koch). 

 b^. Central eye of the lateral series not 

 nearer to the posterior than to the an- 

 terior eye of the same series. 

 a*. Pectinal teeth 16 ; granules finer ; 

 caudal keels less coarsely denticulate; 

 intercarinal spaces granular; cephalo- 

 thorax furnished behind with a tri- 

 angularly depressed area Roeseli (Simon). 



h*. Pectinal teeth 13 ; granules coarser; 

 caudal keels more strongly denticu- 

 late ; intercarinal spaces smooth ; 

 cephalothorax furnished behind with 

 two conspicuous granular promi- 

 nences dictator, sp. n. 



The following African species are known to me only from 

 descriptions and figures : — 



Scorpio bellicosus, L. Koch, ^Egyptische und Abyssinische Arachniden, 

 Niirnberg, 1875, p. 1, pi. i. tig. 1. From Cairo, 



Scorpio meidensis, F. Karsch, Mitth. Miinchn. ent. Ver. 1878, p. 127. 

 From Somali Land. 



Scorpio setosus, C. Koch, Die Arachn. viii. p. 87, fig. 657 ; redescribed 

 by Karsch, Abh. nat. Ver. Bremen, ix. p. 67 (1884). From West 

 Africa, 



For a synoptical table of many species of Scorpio ^ including 

 the three just mentioned, see Karsch, I. c. p. 68. 



Note. — In taking the breadth of the cephalothorax, to 

 avoid error owing to possible shrinking in dried specimens, I 

 have measured from the middle line to the lateral margin, 

 and arrived at the total width by doubling the amount so 

 obtained. In the case of the caudal segments I have 

 measured along the supero-lateral keels, and in the case of 

 the palp measurement has been taken along the greatest 

 length of each segment. 



The palpi have been described as if projecting at right 

 angles to the long axis of the body. 



