26 BUTHLDjE. V 



granular throughout, the anterior marginal ledge closely granular, 

 except in the middle; keels coarsely granular, the laterals breaking 

 up into granules which become lost in the general granulation of 

 the plate. Tail and its crests coarsely granular and thickly hairy, 

 the segments broader and with sides more convex than in the 

 other subspecies. Pectinal teeth 26-32 $ ; 31-36 3 . Length up 

 to about 90 mm. 



Distribution. The area drained by the Upper Ganges and its 

 tributaries; Dehra Dun (type, Gle'adow); Bareilly (Cambridge); 

 Allahabad (Oates); Gwalior; also Bhopal and Satna in Central 

 India (Dane). 



10. Bnthus hendersoni, sp. n. 



$ . Nearly intermediate in characters between B. tamulus and 

 B. rugiscutis. Resembling the typical form of the latter in size, 

 granulation, etc., but with the tail a little thinner ; fingers longer 

 and furnished with a larger number of rows of teeth. Chelae 

 and legs uniformly yellow ; terga infuscate. with paler posterior 

 border ; inferior caudal keels black. Carapace shorter than 1st 

 and 2nd caudal segments taken together, as long as the 5tb. Tail 

 with 2nd segment as long as wide, 3rd the merest fraction longer 

 than wide, width of 1st equal to length of 3rd, less than length of 

 5th ; height of 2nd less than its width ; 5th not twice as long as 

 broad. Chela with rugulose brachium ; hand as wide as brachium, 

 its width about three-fourths the length of the underhand, which 

 is half the length of the movable finger; movable finger a little 

 longer than carapace and furnished with 14 rows of teeth as in, 

 B. tamuJus. Pectinal teeth ranging from 21-26, usually 24. 



c? . With similar sexual characters to those of B. tamulus ; 

 pectinal teeth ranging from 23-29, usually 24-26. 



Total length averaging about 50 mm. ; male usually less than 

 50, large females rarely exceeding 55, in one case up to 59. 



Distribution. Madras Presidency ; Madras, Yercaud in Shevaroy 

 Hills (Henderson), Cuddapah, Trichinopoly, and Tanjore (Popert). 



Though nearly allied to B. tamulus, B. hendersoni cannot be 

 regarded as a subspecies or variety of the former, seeing that 

 it co-exists in the same locality, without blending. 



11. Buthus rngiscutis, Pocock, Jour. Bom. N. H. Soc. xi, p. 106, 1897 ; 



Kraep. Tierr., Scorp. etc. p. 20, 1899. 



Allied to the preceding, but smaller, rougher, with thicker tail, 

 fewer pectinal teeth, and fewer rows of teeth on digits. 



$ . Colour varying from reddish yellow to yellowish brown, the 

 keels of trunk and underside of tail usually black. Upper surface 

 of body entirely covered with coarse granules, amongst which the 

 normal keels stand up as granular ridges ; anterior keels of carapace 

 not traceable for more than halfway across the frontal area'. 

 Tail short, about five times the length of the carapace, thickly and 

 coarsely granular below and at the sides ; the inferior intercarinal 



