834 MB. E. I. POCOCK OS SCORPION'S, PEDIPALPS, [Xov. 14, 



Order SCOEPIOXES. 



Tamily Buthid-IE. 

 Genus Bltthus Leach. 



BtJTHCS (PBio>-rRUS) ciTEiNus (Hempr. & Ehrenb.). 



Androctomts (Prioiiuriis) citrinus, Hem|)r. & Ehrenb. Sjmb. Ph^ys., 

 Scorp. no. 6, pi. ii. %. 2. 



Prionurus citrinus, Pocoek, J. Linn. Soc, Zool. xxv. p. 306 (1896). 



Buthus citrinus, Kraep., Das Tierr., Scorpiones, p. 16 (1899). 



Loc. Senegal {Keys. Coll., and several specimens procured from 

 Heine). 



Apparently extending right across the Saharan region from 

 Senegal to Dongola and Upper Egypt, where it was first procured. 



Buthus occitanus (Amor.). 



Scorpio occiianus, Amoreux, Journ. Phjs. xxv. p. 9, pi. i. figs. 1-3 

 (1753). 



(= occitanus and eurojaceus (Linn.) of recent authors.) 



Loc. Senegal {Heine) ; Gambia {Sir A. Moloney). 



Seuegambia is the southern limit on the west of Africa of this 

 common Mediterranean species. 



BUTEUS HOTTENTOTTA (Fabr.). 



Scorpio hottentotta, Eabr. Ent. Syst. ii. p. 435 (1793). 



Loc. Gambia {Mr. Dalton) ; Sierra Leone {Surg.-Capi. Clements 

 and £. E. Austen) ; Shongo ( W. A. Forbes); Niger {Sir R. Murchi- 

 son) ; Asaba, 180 miles up Niger {I)r. Crosse). 



Genus Lychas C. Koch\ 

 Lychas aspek (Poc). 



Isometriis asper, Pocoek, J. Linn. Soc, Zool. xxiii. p. 445 (1890) ; 

 Kraep. Das Tierr., Scorpiones, p. 49 (1899) {Archisometrus). 



Loc. Congo {J. Pinnoch and A. Curror, Esq., R.N.) ; Ausola 

 {Dr. Welwitsch). 



Genus Uboplectes Pet. 



Ueoplectes occidejttalis Simon. 



Uroplectes occidentalis, Simon, Bull. Soc. Zool. Fr. p. 219 (1876). 

 Lepreus occidentalis, Poc. P. Z. S. 1890, p. 132, pi. xiv. ii". 4; 

 id. Ann. Nat. Hist. (6) xvii. p. 388 (1896) {Uroplectes). 



Tityus chinclioxensis, Karsch, Z. Naturw. lii. p. 370 (1879). 



Based bj' C; Koch upon two species, L. macidatus and L. sc-utilus, wbieh at 

 the present time are nut regarded as congeneric. Tlae first is the type of 

 Henjprich and Ehrenberg's genus homdrux. Consequently L. scidilus stands, by 

 elimination, as the type of Lt/chan. 



Kraepeliu applies this system of elimination to tlie selection of the type of 

 the genus Ueterumdrus, but not to Li/thas. 



