Measurements in ram. Total length 39, carapace 4, tail 27. 

 Loc. Matheran (Phipson). 

 Female unknown. 



40. Isometrus rigidulus, Focock, Journ. Bom. N. H. Sue. xi, p. 113, 

 1897 ; Eraep. Tierr., Scorp. etc. p. 66, 1899. 



Colour varied yellow and black ; anteocular area of carapace 

 black, with two small yellow spots in front of the black tubercle ; 

 terga yellowish round the margins, and with yellow >< -shaped 

 marks ; sterna weakly infuscate at the margins, the 4th and 5th 

 also infuscate mesially ; tail weakly lined with black below, black 

 increasing in amount on the posterior segments, the 5th being 

 almost entirely black; vesicle variegated ; chelae with huinerus and 

 brachium black, yellow-spotted ; hand and fingers yellow, black- 

 spotted. Carapace and terga coarsely and evenly granular through- 

 out ; carapace as long as 5th caudal segment, longer than 1st and 

 half the 2nd. Sterna smooth, the last granular throughout, with 

 four granular keels. Tail about five times as long as carapace, 1st 

 segment about as long as wide, 4th about twice as long as wide ; 

 intercarinal spaces closely and rather coarsely granular throughout ; 

 keels strong, coarsely granular, dorsal keel of 3rd ending in a long 

 and strong upstanding spine ; 5th segment dorsally much elevated, 

 so that the height of the segment is greater than the width and 

 nearly half the length ; vesicle coarsely granular below, the spine 

 triangular, pointed, armed with one tooth, and separated from the 

 aculeus by a space which nearly equals the width of the latter ; 

 aculeus more than half the length of the vesicle. Chelce : brachium 

 without crests on its posterior surface, which is rounded, upper 

 crests granular ; hand smooth, about as wide as the brachium ; 

 movable finger about as long as the carapace and one fourth longer 

 than the underhand, furnished with 7 rows of teeth. Tarsi 

 furnished beneath with 2 rows of long setae. Pectinal teeth 

 13-15. 



Measurements in mm. Total length 29, carapace 3, tail 15. 



Loc. Central India : Bhopal (Dane). 



The following species belonging to the family Buthidse is of 

 doubtful generic position, though probably referable to Lychas or 

 Isometrus, and very possibly specifically identical with Isometrus 

 europceus : 



Scorpio (Atreus) spinax, Gtrvais, Arch. Mus. Paris, iv, p. 225, 



Total length 53 mm., tail 30. A single dorsal keel. Pectinal 

 teeth 19. 

 Loc. India. 



