244 Mr. R. I. Pocock on Scorpions 



A single specimen (young) from Baudin Island. 



I cannot refer this specimen to any known species of Iso- 

 metrus. Perhaps it is most nearly related to /. variatus of 

 Thorell ; but it appears to me to differ from this last-named 

 in its granularly carinate hands, its more distinctly carinate 

 cephalothorax, and in the presence of a tubercle which marks 

 the position of the lateral tergal keels, &c. 



On p. 84 of his recent attempt to revise the Buthidaj, Prof. 

 Kraeplin boldly gives /. Thorellii^ Keys., as a synonym of 

 /. variatus, Thor., and both as synonyms of /. marmoreus of 

 C. Koch. But I think he is wrong in considering Thorellii 

 as synonymous with variatus. The British Museum has six 

 of Keyserling's examples of variatus and many specimens of 

 Thorellii from Australia (Sydney, Swan River, Goulburn 

 River), not including Keyserling's own examples from 

 Sydney — the whole number making a total of fifteen speci- 

 mens of both sexes — and these are very uniform in character, 

 I. e. they are all considerably smaller than /. variatus, are 

 more deeply infuscate above and always infuscate below, and 

 the vesicle and aculeus have a different form from those of 

 /. variatus. 1 know that Prof. Kraeplin has very little 

 regard for variations of colour, but he has not explained the 

 difference in the shape of the caudal vesicle between the two 

 species. This character, correlated with the difference of size 

 (the specimen of lliorellii being to all appearance adult) and 

 the difference of colour, justify, in my opinion, the rejection 

 of this author's view. For my own part, 1 feel tolerably sure 

 that Thorellii is synonymous with marmoreus, but that 

 variatus is a distinct species. 



Urodacus novce-hollandice, Peters. 



Urodacus nov(S-hollandi(B, Peters, Mon. Ak. Wiss. Berlin, 1861, p. 511 ; 

 Pocock, Ann. & Mag. Nat. Hist. (6) ii. pp. 169, 170, pi. viii. fig. 1 ; 

 not U. novce-hollandice, Keyserling, Arach. Austral, pt. 32, pp. 34, 

 35, pi. iii. fig. A. 



Mr. Walker obtained a single specimen at Fremantle, 

 near Perth, in W. Australia — a locality new for the species. 



I find upon examining the specimens that Count Keyser- 

 ling described and figured as U. novce-hollandice that they are 

 not the same species as those specimens in the British Museum 

 to which I had applied this name — one of which is figured 

 in the above-mentioned number of the ' Annals.' 



My reason for thinking that my identification is probably 

 correct and that Count Keyserling was in error is that Peters 

 described the hands of his species as h^mg^^ stark gekielt.''^ 

 This expression applies to my specimens much more forcibly 



