Scorpions of the Genus Tityus. 



511 



been set forth in the subjoined table of species ; but we are at 

 present in the dark as to the true nature of obscurus. The 

 Museum, indeed, has two examples ticketed " Cayenne " 

 which from their distribution might be referable to obscurus, 

 but, unfortunately, these two examples represent probably 

 two distinct subspecies or species; so that it is obviously 

 unsafe to speak of either of them by the name obscurus. The 

 specimens under discussion, it may be added, agree most 

 nearly with the species described in my previous paper as 

 Cambridgei ; but, without knowing the male of the Cayenne 

 forms, it is not possible to be sure of their identity with the 

 Para species. 



Berthold [' Gottingische gelehrte Anz. Nachrichten ' &c. 

 1846, p. 56 &c.) was no doubt correct in regarding his species 

 Gervaisli as distinct from obscurus. It is likely enough, 

 however, to prove identical with /orczjpwZa, though without an 

 examination of the types or topotypes from Popahan, in 

 Colombia, there can be no certainty on this head. 



2b. 



Figs. 1, 1 a. — Last three segments aud vesicle of tail of T.forcipula S • 



Figs. 2, 2 a. — Ditto of T. jmchyurus S ■ 



Fig. 2 h. — Hand aud bracliium of T. pachyurus S • 



Tityus pachyurusy sp. n. (Figs. 2-2 6.) 



Allied to T.forcijyula, Gervais, in general form, but differing 

 in the following particulars : — 



? . As in forcipula the tail is incrassate, the fourth and 

 fifth segments being wider than the first, the widtli of the 

 fourth and fifth being more than half their length ; but the 

 vesicle is much narrower, being a little narrower than the 

 width of the brachium, but distinctly narrower than that of 

 tlie hand, whereas in forcipula the vesicle exceeds in width 

 the width of the brachium and hand ; the vesicular spine, too. 



