Classification of Scorpions. 11 



2. The movable mandibular finger not only provided with a row of 

 teeth in the upper margin, but also with a tooth in the under margin. 

 Dorsal eyes not far removed from the centre of cephalothorax. Tail 



keeled Hadrukus, n.' 



Type H. hirsutus, (Wood), 1863. 



Fam. IV. Pandinoidae. 



Sternum with parallel sides, subpentagonal, generally large. 

 Intermediate lamellae of the combs rather few in number, 

 angular, and (at least most of them) larger than the fulcra, 

 and arranged in a single row. The movable mandibular 

 finger provided with one or two rows, the immovable with a 

 single row of teeth. Hands broader than high, in general 

 large and depressed. The principal lateral eyes three or two, 

 the accessory eyes in general wanting, rarely one on each 

 side. The sixth caudal segment nearly always destitute of a 

 tooth or spine under the sting. 



Subfam. 1. IvRiNi. 



The movable mandibular finger not only provided with a 

 row of teeth in the upper, but also with one or more teeth 

 in the under margin. (Cephalothorax emarginate in front ; 

 dorsal eyes situated far in front of the centre of cephalo- 

 thorax ; lateral eyes three, removed from the lateral margin 

 of cephalothorax. Sternum as broad as the labial lobes of the 

 second pair together. Hands rather large, thick ; the hand- 

 back forming an obtuse angle with the upper surface of the 

 hand. Tail evidently keeled, its sixth joint long, not grooved 

 on the underside.) 



1. The inferior margin of the movable mandibular finger armed with 



one strong tooth. The fine teeth along the middle of the edge of 

 the palp-fingers forming many short oblique rows .... Iurus, n.^ 

 Type /. granidatus, (C. L. Koch), 1838. 



2. The inferior margin of the movable mandibular finger provided with a 



row of (5) teeth. The teeth along the middle of the edge of the 

 palp-fingers forming a single continuous row .... Uroctonus, n.^ 



Type U. viordax, n.* 



' &hpQi, strong ; ovpa, tail. * lbs, poison ; olpa, tail. 



^ ovpa, tail ; KTfivco, kill. 

 * Uroctonus inordax, n. 



Saturate fuscus, costis palporum nigris, abdomine supra plerumque dilu- 

 tiore, pedibus pallidioribus, vesica testaceo-fusca ; cephalothorace sub- 

 tiliter granuloso, segmentis duobus primis cauda3 conjunctim paullo 

 longiore ; digito manus mobili manum posticam longitudine sequante; 

 dentibus pectinum 8-10. Long, circa 50 millim. America septentr., 

 California. 



