﻿THE SCORPIONS OF CALIFORNIA 187 



Hand with distinct ridges or keels, more or less graindate; on under 

 side of second caudal segment the median keels are more or less dis- 

 tinct 9 



Hand without keels, smooth and rounded ; under side of second caudal 

 segment without keels, but indicated by black lines Vejovis spinigcrus. 



The median keels on cauda are strong and granulate, also on last seg- 

 ment of abdomen below ; fingers but little longer than hand ; cephalo- 

 thorax in front of eyes granulate ; the vesicle of male is densely long- 

 haired. (Fig. 81, J) J'ejoris hirsuticauda. 



The median keels on cauda are weak and not granulate ; vesicle of 

 male not densclv long-haired 10 



Figure 81. A. sting' of Centrurus californicus; B, claw of same; C. cla^w of C. exilicauda: 



D. sting' of same; E, claw of Uroctonus mordax: F. clav/ of Hadmrus hirsutuS; 



G. sting' of same; H, sting of Anuroctonus phaiodactylus; I. tarsus 



of Hadrurus hirsutuS; J, sting of 'Vejovis hirsuticauda. 



10. Hand much longer than broad; fingers plainly longer than the hand; 



cephalothorax in front of eyes not granulate Vejovis puuctipalpi. 



Hand nearly as broad as long ; fingers barely longer than hand ; 

 cephalothora.x in front of eyes granulate Vejovis borcus. 



11. The rows of small teeth on the fingers of the claw are flanked by rows 



of similar teeth; about 16 to 25 pectines 13 



The rows of small teeth on the fingers of the claw are not flanked 



by rows of teeth, but sometimes these rows overlap 12 



