Buinrs. 19 



Carapace with anterior border scarcely emarginate, the inter- 

 carinal spaces finely granular ; anterior crests complete and 

 granular, superciliary ridges granular, some coarse granules be- 

 tween the lateral eyes and the ends of the anterior crests ; 

 posterior and median crests in contact, forming a pair of slightly 

 converging, nearly continuous ridges ; distance between the 

 posterior ends of these keels less than distance between ocular 

 tubercle and posterior border of carapace ; carapace about as long 

 as the 5th caudal segment, and as the lst+| the 2nd. Terga 

 granular, the crests strong and granular, subequal, and nearly 

 parallel, posteriorly spiniform. Sterna almost smooth, the last 

 with four finely-granular crests. Tail slender, about five times as 

 long as the carapace ; 1st segment longer than wide, 4th twice as 

 long as wide; the intercarinal spaces scarcely granular; keels 

 evenly granular, except the inferior lateral of the 5th, which 

 posteriorly becomes gradually but not strongly dentate ; median 

 lateral keel traceable, but anteriorly incomplete on 2nd segment ; 

 vesicle weakly granular, about as wide as high, narrower than the 

 5th caudal segment. Chelce with upper side of brachium smooth, 

 scarcely crested except for the anterior granular crest ; hand 

 smooth, not crested, about as wide as the brachium, about two- 

 thirds the length of the underhand, which is about half the length 

 of the movable digit ; movable digit longer than carapace, weakly 

 lobate at base, furnished with 11 rows of teeth. Legs with hairs 

 on the underside of the tarsi. Pectinal teeth 17-19 ( $ ), 



J*0-21(rf). 



Measurements in mm. Total length 46, carapace 5*2, tail 27, 

 movable digit 58. 



Loc. Northern Baluchistan (Maynard <Sf MacMahoii). 



Allied to B. parthorum, Poc., from Northern Afghanistan, but 

 much smaller, tail thinner, &c. 



4. Buthus caucasius, Fischer, Zoogn. i, p. 401, pi. iv, fig. 1, 1813 

 (Scorpio) : eupeus, C. Koch, Arachn. v, p. 127, fig. 419, 1839 

 (Androctonus) ; Birula, Ann. Mm. St. Petersb. i, p. 238, 1896; 

 Kraep. Tierr., Scorp. etc. p. 23, 1899 (Buthus) ; ornatus, Nordman 

 in Demidoff, Voy, Russie, iii, p. 732, Arachn. i, fig. 2, 1840 

 (Androctonus). 



Subspecies persicus, Pocock, Journ. Linn. Sac., Zool. xxvij, p. 404, 1899. 



Eesembling the following species, B. atrostriatus, in colour and 

 most structural features, but with the intercarinal spaces of the 

 carapace and tail smooth, the sides of the terga only granular, the 

 median intercarinal spaces being smooth, the inferior median keels 

 of the 2nd and 3rd caudal segments with the granules posteriorly 

 increasing in size, the tubercles on the inferior lateral keels of the 

 5th caudal segment much larger, and the tubercles on the lower 

 surface of the segment between the keels also much coarser ; inter- 

 carinal spaces of humerus and brachium also smooth. Pectinal teeth 

 18-21. 



c2 



