834 MR. B. I. POCOCK ON SCORPIONS, PEDIPALPS, [NoV. 14, 



Order SCOEPIONES. 



Family Buthidje. 

 Genus Bpthus Leacli. 



BuTHUS (Pbioxurus) citrinus (Hempr. & Ebrenb.)- 



Androctonus (Prionurus) citrinus, Hemjir. & Ehrenb. Symb. Phys., 

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



Prionurus citrinus^ Pocock, J. Linn. Soc, Zool. sxv. p. 306 (1896). 



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



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

 Heine). 



Apparently extending right across llie Saharan region from 

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



Buthus occitanus (Amor.). 



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

 (1753). 



(= occitanus and europceus (Linn.) of recent authox's.) 



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



Senegambia is the southern limit on the west of Africa oE this 

 common Mediterranean species. 



Buthus hottentotta (Fabr.). 



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



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

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

 son) ; Asaba, 1 80 miles up Niger {Dr. Crosse). 



Genus Lychas C. Koch\ 

 Lyohas asper (Poc). 



Isometrus asper, Pocock, J. Linn. Soc, Zool. xxiii. p. 445 (1890) ; 

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



Loc. Congo {J. Pinaoch and A. Curror, Esq., B.N.) ; Angola 

 {Dr. Wehvitsch). 



Genus Uroplectes Pet. 



Uroplectes oocidentahs Simon. 



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

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

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



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



Based by 0. Koch upon two species, L. maculatus and L. scuiilus, which at 

 the present time are not regarded as congeneric. The first is the tjpe of 

 Henipi-ich and Ehrenberg's genus Isometrics. Consequently L. scuiilus stands, by 

 elimination, as the tj-pe of Lychas. 



Kraepelin applies this system of elimination 1o the selection of the type of 

 tlie genus Hcterometrus, but not to Lychas. 



