41G Mr. R. T. Pocock on new 



the movable more than twice the length of the hand-back, 

 verj weaklj lobate, furnished with 15 rows of teeth. 



Sterna weakly granular, the middle and posterior portions 

 of sterna 1-4 smooth. 



Pectinal teeth 21. 



Measurements in millimetres. — Total length 69, of cara- 

 pace 7, of tail 40'5; width of first segment 3*3, of fifth 3*2, 

 length of latter 7'5 ; width of vesicle 2*5, of brachium 2*6, of 

 hand 2'3 ; length of hand-back 4, of movable digit 10'2. 



Loc. Cachavi, Ecuador {Rosenberg). 



Falling under heading h^ of my synopsis of species based 

 upon females (op, cit. p. 518), alongside of T. Camhridgei, 

 but differing from the latter in having the intercarinal spaces 

 of the tail and its keels much less strongly granular, the hand 

 narrower and shorter as compared with the movable digit, 

 with the external finger-keel of the hand complete and not 

 mesially broken. 



Tityus spi'natus, sp. n. 



Belonging to the americanus section and nearly allied to 

 T.forcipula, Gervais, from Ibaque in Colombia. 



Colour uniform black or brownish black. 



Trunk coarsely granular above ; sterna and coxse closely 

 granular throughout below, with the exception of a small 

 smooth triangular area in the middle of the third sternite. 



Tail incrassate to the middle of the fourth and fifth seg- 

 ments, the intercarinal spaces thickly and coarsely granular, 

 the superior more finely so ; all the keels coarsely granular, 

 the superior denticulate and ending on the second to fourth 

 segments in an enlarged tooth ; granules on upper edge of 

 fifth segment forming a denticulate crest ; vesicle granular 

 below, tooth close to base of aculeus ; vesicle distinctly wider 

 than brachium, a little wider than hand; fifth caudal segment 

 about as long as carapace, its width about two thirds its 

 length ; width of fourth about three quarters its own length 

 and almost equal to length of second segment. 



Chelce closely granular, normally costate ; hand very 

 slightly wider than brachium j hand-keels not strong, the 

 external finger-keel weak, but not divided ; movable digit a 

 little more than twice as long as hand-back, weakly lobate 

 basally, with 15 rows of teeth. 



Pectinal teeth 15. 



Measurements in millimetres. — Total length 58 ; length of 

 carapace 6*5, of tail 35 ; width of its first segment 4, of its 



