new Species of Scorpions. 415 



caudal segment, as long as the fourth ; median excision deep; 

 frontal lobes quadrate; interocular area smooth and polished ; 

 sides granular. 



Terga closely granular ; sterna smooth. 

 Tail very long, a little more than six times as long as the 

 carapace ; first segment almost or quite twice as long as wide, 

 fifth nearly five times as long as wide ; the superior keels of 

 the first, second, and third segments gradually elevated 

 behind and ending in a small spiniform tooth. 



Vesicle large, its width equal to that of the third segment, 

 its height equal to its width. 



Chelce : humerus granular above ; brachium smooth above 

 and behind, a few large scattered punctures behind ; a row of 

 8-9 pores below ; hand normally but not so strongly keeled 

 as in U. armatus, Poc, and U, novce-hollandios *, quite smooth 

 above externally and below ; very weakly granular internally ; 

 about 12 pores along the underside of the keel. 



Legs with femora weakly granular, patella smooth; pro- 

 tarsi of first and second with 5 external spines. 

 Pectinal teeth 17-18. 



Measurements in millimetres. — Total length 94; length cf 

 carapace 10, of tail 62, of its fifth segment 15. 



Loc. Muldiva in North Queensland, £ (Dr. Lfroorri). 

 Differs from all the known species of the genus in the 

 great length of the tail in the male. The nearest to it in this 

 respect is U. Jiopluritsf, Poc, from the East Murchison Gold 

 Field, West Australia, in which the tail is about five times 

 as long as the carapace. The two species also resemble each 

 other in the large size of the vesicle ; but in other characters 

 they are very distinct. According to the table of the species 

 of the genus that I published in the paper cited below, the 

 species ranges itself under heading b 7 alongside of U. nova- 

 hollandice, but, apart from the great length of the tail, may 

 be recognized by the posteriorly spiniform dorsal crests of this 

 organ, the large vesicle, &c. 



This species is further of great interest inasmuch as it is 

 the first representative of the genus Urodacus that has been 



* I learn from Prof. Kraepelin (in titt.) that the specimens from Perth 

 in the British Museum which I formerly identified as U. novts-hollandiee, 

 Pet., and which were, I believe, so named by Peters himself, are not 

 specifically identical with the specimens in the Berlin Museum described 

 under that name by this author. Probably manieatvs, Thor., is their 

 correct title, but, pending the publication of Prof. Kraepelin's latest con- 

 clusions on this point, I retain for them the term I have hitherto assigned 

 to them. 



t Ann. & Mag-. Nat. Hist. (7) ii. p. 64 (1898). This paper contains 

 diagnoses of all the species of the genus known to me at that time, 



