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4 



SCORPIONES. 



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The above-given description of this subspecies is taken from adult male and female 

 specimens from the Rio Cianati, Darien, kindly lent to me for the purpose by 



Dr. A. Borelli. 



A comparison of the female with the type of Tityus championi, Poc, from Bugaba, 

 Panama, convinces me that the two are conspecific, and that the supposedly specific 

 characters of the latter are due to immaturity. In most structural points the two 

 are practically alike, the chief differences being the absence of the pectinal lobe, the 

 thinner hand, more granular caudal keels, and the variegated coloration of the type of 



T. championi. 



The adult male, as described above, is a tolerably uniform deep blackish -brown colour, 

 with scarcely a trace of paler spots, except on the posterior angles of the terga. The 







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female, on the contrary, which, although adult, is rather smaller, is distinctly redder 

 than the male, especially on the tail and chela?, and the terga exhibit a distinct angular 

 yellow spot and four smaller less distinct spots on the posterior margin on each side of 

 the middle line. The type of T. championi is smaller still and very considerably paler, 

 the prevailing coloration being yellowish-brown with darker mottling; the legs are 

 indistinctly annulated, the chelae are reddish-yellow with very indistinct pale spots, the 

 ringers being blackish with yellow tips ; three dark bands are traceable on the terga, 

 and the posterior yellow spots on these plates are very distinct ; the sides of the caudal 

 segments are paler in the middle than in front and behind, and the vesicle and lower side 

 of the fifth segment are nearly black. Its measurements are as follows : — Total length 

 62 mm., tail 39, carapace 6*5 ; width of hand 2'5 ; length of underhand 4*5, of movable 

 finger 9. In a second, but much smaller, specimen from Bugaba measuring 30 mm., 



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with the carapace 3, and the tail 18, the variegated coloration traceable in the type 

 is much more pronounced, the specimen closely resembling in colour the species of 



Tityus, typified by T. columbianus, T. silvestris, &c. It is noticeable that the humerus 



and brachium are palely fuscous with yellow spots, and that the clear yellow hand 

 contrasts strongly with the fuscous tint of the fingers, which have clear yellow tips. 





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prettily variegated with black and yellow in its young stag 



and gradually assumes a darker hue as it approaches matur 



g ultimately, 



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that all the numerous allied 



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when adult, almost entirely black. It is highly probable 

 species pass through similar stages of coloration. 



2. Tityus festse. (Tab. IX. fig. 4.) 



Tityus f est (B, Borelli, Boll. Mus. Torino, xiv. no. 338, pp. 1-3 (1899) \ 



cS . Resembling the male of T. cambridgei in colour and most structural points, but with the caudal crests much 

 more coarsely granular, the inferior crests of the fourth segment distinctly granular ; the first segment as 

 wide as the fourth. Chelce much shorter and the hand broader; the brachium only a little longer than 

 the carapace, and about three times as long as wide ; the hand much wider than the brachium, its width 

 more than half the length of the underhand, the latter much more than half the length of the movable 

 finger ; the movable finger about as long as the fifth caudal segment, longer by one-fourth of its length 

 than the carapace, both lingers strongly lobate, but not widely separated at base, Pectinal teeth 20-21. 



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