and Species of Scorpions. 329 
normal aculeus) from Virginia, belonging to the collection of 
Owens College, Manchester. 
It is a singular thing that Dr. Karsch, who has seen this 
species, referred it to Uroctonus, and characterizes Uroctonus 
as having a series of teeth on the lower border of the digit of 
the cheliceree. Dr. Marx also referred it to Uroctonus. But 
I cannot see any series of teeth at all comparable to the series 
presented by Uroctonus. On the contrary, there is only one 
tooth, not so large it is true as the one in Hadrurus, but 
occupying the same position, and the edge in front of this 
may be finely roughened; but there is no structure presented 
that I should call a series of teeth. 
Of course a solution to the difficulty is that I have 
examined a species which is not phwodactylus. I cannot, 
however, without further evidence bring myself to believe 
this, on account of the closeness of the application of Wood’s 
description to my specimen. 
HADRUROIDES, gen. nov. (Pl. XIV. figs. 16 and 17.) 
Allied to Caraboctonus, Pocock, but recognizable by the 
dentition on the digits of the chele. 
In Caraboctonus Keyserlingii thesmedian series consists of 
a few (six) longitudinal slightly overlapping rows of denticles, 
the posterior denticle of each being enlarged, while on the 
inner side of the anterior extremities of each row there is a 
large tooth, all the large teeth together forming an inner 
series. ‘This arrangement is well shown in fig. 21, pl. Ixxxiii. 
vol. i. of the Trans. Zool. Soc.* 
In Hadruroides the dentition is on the same plan as in 
Caraboctonus, but the large teeth of the inner series are further 
back from the ends of the median rows, and close to the 
latter on the outer and inner side are a few (two or three) 
supernumerary denticles. 
Type Hadrurus charcasus (Karsch). 
On p. 92 of the August number of the ‘Annals’ for this 
year | referred H. charcasus of Karsch to Caraboctonus. But 
the dentition of the chele seems to me to be of sufficient 
importance for the establishment of a genus}. The species 
in the Museum identified as probably maculatus or robustus, 
* In fact there can be no doubt that the “7elegonus from Coquimbo ” 
mentioned and figured by Prof. Lankester in this paper is the specimen I 
have made into the type of Carabuctonus Keyserlingzt. Further details 
are represented on pl. Ixxxii. figs. 4, 12, and 16, and pl. Ixxxiil. figs. 7 
and 19. 
+ The differences between Caraboctonus and Hadruroides are strictly 
comparable to those that obtain between Centrurus and Tityus. 
