404 ME. R. I. POCOCK ON THE 



seven times as long as width of head ; tibia, 

 protarsus, and tarsus completely black ; distal 

 tarsal segment of 2nd and 3rd legs with 



two anterior spines cyrus, Poc* 



b. Ocular tubercle much smaller, its width about 

 one-fifth that of the head-plate ; palpus shorter, 

 only about six times as long as the width of 

 the head ; the tibia pale at the apices ; tarsus 

 scarcely infuscate ; distal tarsal segment of 2nd 

 and 3rd legs with one anterior spine. 

 a! . Cephalic plate, legs, and femur of palpus 



scarcely noticeably infuscate ; lower fang of 



mandible with only 1 small supernumerary 



tooth between the two larger teeth citrinus, Poc. 



V . Cephalic plate, posterior legs, and femur of 



palpus distinctly infuscate ; lower fang of 



mandible with 3 supernumerary teeth truculentus, sp. n. 



Order Scobptones. 

 Genus Buthus, Leach. 



BUTHUS CAUCASICTJS (Flscher). 



Scorpio caucasicus, Fischer, Zoogn. p. 401, pi. iv. fig. 1 (1813) (= 

 eujjeiis and thersites, C. Koch). 



Subsp, PEESICUS, BOV. 



Colour. Tergites yellow witli five black stripes, three marking 

 the keels and one on each side between tbe lateral keels and the 

 border ; carapace correspondingly marked in its posterior half ; 

 in its anterior half the tubercle, the frontal keels, and the anterior 

 border are black, and there is a black patch on each side between 

 the ocular tubercle and the lateral margin ; median and lateral 

 inferior caudal keels black ; palpi yellow, with traces of black 

 lines on the humerus, brachium, and hand ; femur and patella 

 (tibia) of legs also partially infuscate. 



Structurally this Scorpion much resembles B. afghanus, Poc. 

 (Tr. Linn. Soc. (2) iii. p. 116, 1889), from Meshed in Afghanistan; 

 but the tail is considerably more powerful in B. persicus, the 

 segments being relatively both higher and broader. Por example, 

 the height of the 3rd segment in the 6 is about equal to the 

 length of the inferior keel, and that of the $ a little less, 

 whereas in afglianus {6 2) the height is noticeably less. Again, 



* Ann. Mag, Nat. Hist. (6) xvi. p. 79 (1895). Based upon a single male 

 example from Fao (H^. D. Cuming). 



