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TITYTTS 



41 





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weakly granular ; vesicle weakly granular, with a large, triangular, bitubercular, subaculear spine ; 

 first caudal segment about one-third longer than wide, second about twice as long as wide, fifth twice 

 and a half as long as wide. Chelce finely granular, with granular keels ; anterior keel of the brachium 

 irregularly denticulate ; brachium longer by one-third of its length than the carapace, and at least four 

 times as long as wide ; hand scarcely as wide as the brachium, the underhand concave, almost as long as 

 the carapace, and about three times as long as the width of the hand ; keels on the hand almost obsolete ; 

 fingers long, the movable with a weak basal lobe, longer by one-third of its length than the carapace, and 



furnished with fifteen rows of teeth. Legs finely granular, crested. Pectines with only a small basal 



lobe and 19-20 teeth. : 



5 . Like the male in colouring, but with the tail shorter, less than six times as long as the carapace, with 

 the keels more strongly granular ; the fourth segment as long as the carapace, the third about twice 

 as long as wide, the first segment a little wider than the fourth or fifth. Chelce shorter and stouter 

 than in male ; the brachium twice and a half as long as wide ; hand as wide as the brachium, lightly 

 convex externally, globular internally, distinctly crested above and externally ; the underhand less than 

 twice as long as the width of the hand, and a little less than half the length of the movable finger, which 

 is more strongly lobate than in the male. Pectines with 20 teeth, and a large, smooth, subcircular, 

 basal lobe. 

 Measurements in mm. — c? • Total length 85, carapace 8 ; tail 56, its first segment 10 ; length of brachium 12*5, 

 width 2-3 ; length of underhand 7*5, width of hand 2 ; length of movable finger 12-5. $ . Total length 75, 

 length of carapace 7*5, of tail 45, of brachium 7'5 ; width of brachium 3, of hand 3 ; length of under- 



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hand 4*5, of movable finger 10. 



Hab. Costa Kica, Cerros de los Carrones, Buvica (Pittier) ; Panama, Bugaba 

 (Champion), forest along the Rio Cianati and on the shores of Lake Pita, Darien 



(Br. Festa). 



On the label accompanyin 



by H. Pittier is the information 



that the species is to be met with " In damp places under dried leaves." 



The typical form of Tityus cambridgei occurs at Para, near the mouth of the Amazons 

 where examples ( c? $ ) were collected by Messrs. F. O. P. Cambridge and E. E. Austen 



From the Am 



northwards into Surinam, whence the British 



Museum has received examples ( 6 2 ) obtained on the Upper Surinam Eiver by 

 Mr. C. W. Ellacombe, and from Surinam to Ecuador and Panama. The Surinam 

 and Panama scorpions, however, differ from the southern form in certain characters 

 which justify the view as to the subspecific distinction of the two. 

 The differences may be tabulated as follows : — 



a. Keels on the hand standing out as sharply defined, finely granular crests ; 



intercarinal spaces of the tail, especially in the female, very distinctly and 



closely granular throughout, the keels more coarsely granular ; hand in the 

 '■ female thinner, narrower than the brachium, its width about half the length 

 of the underhand ; inferior median keels on the fourth caudal segment in 



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the male distinct and granular 



cambridgei, Poc, typical form. 



b Keels on the hand weaker and smooth; intercarinal spaces of tail obsoletely 



granular, the keels less strongly granular ; hand in the female as wide as 

 brachium, its width much more than half the length of the underhand ; 

 inferior median keels on the fourth caudal segment in the male obsolete 



and smooth 



.* 



Subsp. championi, Poc. 



Arachn. Scorp. & Pedip., October 190,2. g 





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