Classification of Scorpions. 309 
Subfamily Zvrzvz. 
Sternum longer than wide or wider than long, its posterior 
half with a deep median longitudinal groove. 
Feet not laterally spined beneath, but furnished with a 
median series of spinules or tufts of hair. 
Three lateral eyes on each side. 
The movable digit of the chelicere is very generally fur- 
nished with a tooth or teeth on its inferior edge, but the 
corresponding border of the immovable is unarmed. 
Genera: Scorpiops, Peters; Jurus, Thorell; Uvroctonus, 
Thorell; Anwroctonus*, gen. nov.; Vejovis, C. Koch ; 
Hadrurus, 'Thorell; Caraboctonus, Pocock; Hadru- 
roides T, gen. nov. 
Distribution. Mediterranean, N. India and Burma; S. Ne- 
arctic to Chili. 
Considering the wide geographical range of this group and 
the difference of aspect presented by such of its members as 
Scorpiops and Hadrurus, one would be inclined to think the 
assemblage an unnatural one. But the intermediate forms 
that exist seem to show that this is not the case. For 
instance, from Scorpiops to Zurus is not a great leap; and 
similarly we can proceed from Jurus through Uroctonus and 
Anuroctonus to Vejovis, or through Hadrurotdes and Carabo- 
ctonus to Hadrurus. Hadrurus undoubtedly differs very much 
from furus, but no one will probably dispute that it is nearly 
allied to Caraboctonus; and the similarity that obtains be- 
tween Caraboctonus and Jurus with respect to armature of 
the mandible, the hairy clothing of the soles of the feet, &c., 
may surely, when taken in conjunction with the other features 
already pointed out as characteristic of the Iurini, point to 
real kinship between the two. 
Subfamily Cazerzr7. 
Sternum long, as long or longer than wide, with a_poste- 
rior rounded impression, the lateral portions of its posterior 
half not thrust up on each side of the middle line. 
Lectines very short, with all the intermediate lamellae except 
a proximal piece obsolete, and the teeth very large. 
Stigmata circular. 
‘T'wo lateral eyes on each side. 
* For Centrurus pheodactylus, Wood, ef. infra 
t+ For Hadrurus charcasus, Karsch, cf. infra. 
