40 Mr. R. I. Pocock on 
from Singapore, the place where the type of P. Petersit was 
obtained—a coincidence which suggests at once the likelihood 
of specific identity between the scorpions. And this idea as 
to their identity 1s amply borne out by Dr. Thorell’s descrip- 
tion of Petersi’; for the vesicle is described as ferruginous, 
and of the hand it is said ‘‘¢pso latere interiore granulis 
acuminatis jortibus obsito.” But if we turn to what is said 
of the Burmese specimens that were referred to Petersit we 
read, “ manus intus sat dense granulosa est, granulis sat parvis 
et parum acuminatis,”’ and again, “ color caude niger, vesica 
interdum paullo clariore.” ‘Thus the figure of spinifer and 
the description of Petersi’ appear to apply to the larger and 
more widely distributed Hast-Indian form. ‘The smaller 
Burmese species is consequently without a name. I propose 
therefore to call it P. Thorellit. 
As regards the number of the pectinal teeth, which seems 
to have been a stumbling-block in the way of the identifica- 
tion of P. spinifer, it may be said that the Museum series 
shows them to vary from 14 to 18 in spinifer and from 14 to 
19 in Thorellit. So that the existence of 19 in the type of 
spinifer and of 16 in the type of Peters¢d cannot be used as 
an argument for the separation of the two. 
The known synonymy of these will be as follows :— 
Palamneus spinifer (Hempr. & Ehrb.). 
Heterometrus spinifer, Hempr. & Ehrb. Symb. Phys. Scorpiones, p. 3, 
pl. i. fig. 2 (1829). 
Palamneus Petersii, Thorell, Ann. & Mag. Nat. Hist. (ser. 4) vol. xvii. 
p. 13 (1876) ; Actes Soe. Ital. Sci. Nat. xix. pp. 214-217 (syn. excl.) 
(1877). 
Palamneus Thorelli, sp. n. 
Palamneus bengalensis, Simon, Ann. Mus. Genov. xx. pp. 360-362 
(1884) ; not Buthus bengalensis, C. Koch, Die Arach. ix. p. 3, fig. 696 
(1842). 
Palamneus Petersii, Thorell, Ann. Mus. Genov. (2) vii. pp. 588-590 
(1889) ; not Peters, Thorell, 1876, 
The average size of P. spinifer is perhaps about 125 
millim., although I have measured many varying from 135 
to 140. P. Thorellii, on the contrary, is much less, seldom 
being more, and generally less, than 115 millim. 
The appended tables of measurements will serve to show 
how the sexes of the two species may be recognized. From 
it may be seen, in addition, that the average length of the 
tail in the female is greater in P. spinifer than in P. Thorellit. 
