THE SCORPIONS OF CALIFORNIA 



187 



8. Hand with distinct ridges or keels, more or less granulate; 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. 



9. 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) Vejovis hirsuticauda. 



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

 male not densely long-haired 10 



Figure 81. A. sting of Centrurus californicus; B. claw of same[ C, clav/ of C. exilicauda; 



D. sting of same; E. claw of Uroctonus mordax; F, claw of Hadrurus hirsutusj 



G, sting of same; H. sting of Anuroctonus phaiodactylus; 1. tarsus 



of Hadrurus hirsutus; J, sting of Vejovis hirsuticauda. 



10. 



11. 



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



cephalothorax in front of eyes not granulate Vejovis punctipalpi. 



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

 cephalothora.x in front of eyes granulate Vejovis bovciis. 



The rows of small teeth on the fingers of the claw are flanked b)' 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 



